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1 <?php 2 /** 3 * WordPress Post Template Functions. 4 * 5 * Gets content for the current post in the loop. 6 * 7 * @package WordPress 8 * @subpackage Template 9 */ 10 11 /** 12 * Displays the ID of the current item in the WordPress Loop. 13 * 14 * @since 0.71 15 */ 16 function the_ID() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid 17 echo get_the_ID(); 18 } 19 20 /** 21 * Retrieves the ID of the current item in the WordPress Loop. 22 * 23 * @since 2.1.0 24 * 25 * @return int|false The ID of the current item in the WordPress Loop. False if $post is not set. 26 */ 27 function get_the_ID() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid 28 $post = get_post(); 29 return ! empty( $post ) ? $post->ID : false; 30 } 31 32 /** 33 * Displays or retrieves the current post title with optional markup. 34 * 35 * @since 0.71 36 * 37 * @param string $before Optional. Markup to prepend to the title. Default empty. 38 * @param string $after Optional. Markup to append to the title. Default empty. 39 * @param bool $echo Optional. Whether to echo or return the title. Default true for echo. 40 * @return void|string Void if `$echo` argument is true, current post title if `$echo` is false. 41 */ 42 function the_title( $before = '', $after = '', $echo = true ) { 43 $title = get_the_title(); 44 45 if ( strlen( $title ) == 0 ) { 46 return; 47 } 48 49 $title = $before . $title . $after; 50 51 if ( $echo ) { 52 echo $title; 53 } else { 54 return $title; 55 } 56 } 57 58 /** 59 * Sanitizes the current title when retrieving or displaying. 60 * 61 * Works like the_title(), except the parameters can be in a string or 62 * an array. See the function for what can be override in the $args parameter. 63 * 64 * The title before it is displayed will have the tags stripped and esc_attr() 65 * before it is passed to the user or displayed. The default as with the_title(), 66 * is to display the title. 67 * 68 * @since 2.3.0 69 * 70 * @param string|array $args { 71 * Title attribute arguments. Optional. 72 * 73 * @type string $before Markup to prepend to the title. Default empty. 74 * @type string $after Markup to append to the title. Default empty. 75 * @type bool $echo Whether to echo or return the title. Default true for echo. 76 * @type WP_Post $post Current post object to retrieve the title for. 77 * } 78 * @return void|string Void if 'echo' argument is true, the title attribute if 'echo' is false. 79 */ 80 function the_title_attribute( $args = '' ) { 81 $defaults = array( 82 'before' => '', 83 'after' => '', 84 'echo' => true, 85 'post' => get_post(), 86 ); 87 $parsed_args = wp_parse_args( $args, $defaults ); 88 89 $title = get_the_title( $parsed_args['post'] ); 90 91 if ( strlen( $title ) == 0 ) { 92 return; 93 } 94 95 $title = $parsed_args['before'] . $title . $parsed_args['after']; 96 $title = esc_attr( strip_tags( $title ) ); 97 98 if ( $parsed_args['echo'] ) { 99 echo $title; 100 } else { 101 return $title; 102 } 103 } 104 105 /** 106 * Retrieves the post title. 107 * 108 * If the post is protected and the visitor is not an admin, then "Protected" 109 * will be inserted before the post title. If the post is private, then 110 * "Private" will be inserted before the post title. 111 * 112 * @since 0.71 113 * 114 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. 115 * @return string 116 */ 117 function get_the_title( $post = 0 ) { 118 $post = get_post( $post ); 119 120 $title = isset( $post->post_title ) ? $post->post_title : ''; 121 $id = isset( $post->ID ) ? $post->ID : 0; 122 123 if ( ! is_admin() ) { 124 if ( ! empty( $post->post_password ) ) { 125 126 /* translators: %s: Protected post title. */ 127 $prepend = __( 'Protected: %s' ); 128 129 /** 130 * Filters the text prepended to the post title for protected posts. 131 * 132 * The filter is only applied on the front end. 133 * 134 * @since 2.8.0 135 * 136 * @param string $prepend Text displayed before the post title. 137 * Default 'Protected: %s'. 138 * @param WP_Post $post Current post object. 139 */ 140 $protected_title_format = apply_filters( 'protected_title_format', $prepend, $post ); 141 $title = sprintf( $protected_title_format, $title ); 142 } elseif ( isset( $post->post_status ) && 'private' === $post->post_status ) { 143 144 /* translators: %s: Private post title. */ 145 $prepend = __( 'Private: %s' ); 146 147 /** 148 * Filters the text prepended to the post title of private posts. 149 * 150 * The filter is only applied on the front end. 151 * 152 * @since 2.8.0 153 * 154 * @param string $prepend Text displayed before the post title. 155 * Default 'Private: %s'. 156 * @param WP_Post $post Current post object. 157 */ 158 $private_title_format = apply_filters( 'private_title_format', $prepend, $post ); 159 $title = sprintf( $private_title_format, $title ); 160 } 161 } 162 163 /** 164 * Filters the post title. 165 * 166 * @since 0.71 167 * 168 * @param string $title The post title. 169 * @param int $id The post ID. 170 */ 171 return apply_filters( 'the_title', $title, $id ); 172 } 173 174 /** 175 * Displays the Post Global Unique Identifier (guid). 176 * 177 * The guid will appear to be a link, but should not be used as a link to the 178 * post. The reason you should not use it as a link, is because of moving the 179 * blog across domains. 180 * 181 * URL is escaped to make it XML-safe. 182 * 183 * @since 1.5.0 184 * 185 * @param int|WP_Post $post Optional. Post ID or post object. Default is global $post. 186 */ 187 function the_guid( $post = 0 ) { 188 $post = get_post( $post ); 189 190 $guid = isset( $post->guid ) ? get_the_guid( $post ) : ''; 191 $id = isset( $post->ID ) ? $post->ID : 0; 192 193 /** 194 * Filters the escaped Global Unique Identifier (guid) of the post. 195 * 196 * @since 4.2.0 197 * 198 * @see get_the_guid() 199 * 200 * @param string $guid Escaped Global Unique Identifier (guid) of the post. 201 * @param int $id The post ID. 202 */ 203 echo apply_filters( 'the_guid', $guid, $id ); 204 } 205 206 /** 207 * Retrieves the Post Global Unique Identifier (guid). 208 * 209 * The guid will appear to be a link, but should not be used as an link to the 210 * post. The reason you should not use it as a link, is because of moving the 211 * blog across domains. 212 * 213 * @since 1.5.0 214 * 215 * @param int|WP_Post $post Optional. Post ID or post object. Default is global $post. 216 * @return string 217 */ 218 function get_the_guid( $post = 0 ) { 219 $post = get_post( $post ); 220 221 $guid = isset( $post->guid ) ? $post->guid : ''; 222 $id = isset( $post->ID ) ? $post->ID : 0; 223 224 /** 225 * Filters the Global Unique Identifier (guid) of the post. 226 * 227 * @since 1.5.0 228 * 229 * @param string $guid Global Unique Identifier (guid) of the post. 230 * @param int $id The post ID. 231 */ 232 return apply_filters( 'get_the_guid', $guid, $id ); 233 } 234 235 /** 236 * Displays the post content. 237 * 238 * @since 0.71 239 * 240 * @param string $more_link_text Optional. Content for when there is more text. 241 * @param bool $strip_teaser Optional. Strip teaser content before the more text. Default false. 242 */ 243 function the_content( $more_link_text = null, $strip_teaser = false ) { 244 $content = get_the_content( $more_link_text, $strip_teaser ); 245 246 /** 247 * Filters the post content. 248 * 249 * @since 0.71 250 * 251 * @param string $content Content of the current post. 252 */ 253 $content = apply_filters( 'the_content', $content ); 254 $content = str_replace( ']]>', ']]>', $content ); 255 echo $content; 256 } 257 258 /** 259 * Retrieves the post content. 260 * 261 * @since 0.71 262 * @since 5.2.0 Added the `$post` parameter. 263 * 264 * @global int $page Page number of a single post/page. 265 * @global int $more Boolean indicator for whether single post/page is being viewed. 266 * @global bool $preview Whether post/page is in preview mode. 267 * @global array $pages Array of all pages in post/page. Each array element contains 268 * part of the content separated by the `<!--nextpage-->` tag. 269 * @global int $multipage Boolean indicator for whether multiple pages are in play. 270 * 271 * @param string $more_link_text Optional. Content for when there is more text. 272 * @param bool $strip_teaser Optional. Strip teaser content before the more text. Default false. 273 * @param WP_Post|object|int $post Optional. WP_Post instance or Post ID/object. Default null. 274 * @return string 275 */ 276 function get_the_content( $more_link_text = null, $strip_teaser = false, $post = null ) { 277 global $page, $more, $preview, $pages, $multipage; 278 279 $_post = get_post( $post ); 280 281 if ( ! ( $_post instanceof WP_Post ) ) { 282 return ''; 283 } 284 285 // Use the globals if the $post parameter was not specified, 286 // but only after they have been set up in setup_postdata(). 287 if ( null === $post && did_action( 'the_post' ) ) { 288 $elements = compact( 'page', 'more', 'preview', 'pages', 'multipage' ); 289 } else { 290 $elements = generate_postdata( $_post ); 291 } 292 293 if ( null === $more_link_text ) { 294 $more_link_text = sprintf( 295 '<span aria-label="%1$s">%2$s</span>', 296 sprintf( 297 /* translators: %s: Post title. */ 298 __( 'Continue reading %s' ), 299 the_title_attribute( 300 array( 301 'echo' => false, 302 'post' => $_post, 303 ) 304 ) 305 ), 306 __( '(more…)' ) 307 ); 308 } 309 310 $output = ''; 311 $has_teaser = false; 312 313 // If post password required and it doesn't match the cookie. 314 if ( post_password_required( $_post ) ) { 315 return get_the_password_form( $_post ); 316 } 317 318 // If the requested page doesn't exist. 319 if ( $elements['page'] > count( $elements['pages'] ) ) { 320 // Give them the highest numbered page that DOES exist. 321 $elements['page'] = count( $elements['pages'] ); 322 } 323 324 $page_no = $elements['page']; 325 $content = $elements['pages'][ $page_no - 1 ]; 326 if ( preg_match( '/<!--more(.*?)?-->/', $content, $matches ) ) { 327 if ( has_block( 'more', $content ) ) { 328 // Remove the core/more block delimiters. They will be left over after $content is split up. 329 $content = preg_replace( '/<!-- \/?wp:more(.*?) -->/', '', $content ); 330 } 331 332 $content = explode( $matches[0], $content, 2 ); 333 334 if ( ! empty( $matches[1] ) && ! empty( $more_link_text ) ) { 335 $more_link_text = strip_tags( wp_kses_no_null( trim( $matches[1] ) ) ); 336 } 337 338 $has_teaser = true; 339 } else { 340 $content = array( $content ); 341 } 342 343 if ( false !== strpos( $_post->post_content, '<!--noteaser-->' ) && ( ! $elements['multipage'] || 1 == $elements['page'] ) ) { 344 $strip_teaser = true; 345 } 346 347 $teaser = $content[0]; 348 349 if ( $elements['more'] && $strip_teaser && $has_teaser ) { 350 $teaser = ''; 351 } 352 353 $output .= $teaser; 354 355 if ( count( $content ) > 1 ) { 356 if ( $elements['more'] ) { 357 $output .= '<span id="more-' . $_post->ID . '"></span>' . $content[1]; 358 } else { 359 if ( ! empty( $more_link_text ) ) { 360 361 /** 362 * Filters the Read More link text. 363 * 364 * @since 2.8.0 365 * 366 * @param string $more_link_element Read More link element. 367 * @param string $more_link_text Read More text. 368 */ 369 $output .= apply_filters( 'the_content_more_link', ' <a href="' . get_permalink( $_post ) . "#more-{$_post->ID}\" class=\"more-link\">$more_link_text</a>", $more_link_text ); 370 } 371 $output = force_balance_tags( $output ); 372 } 373 } 374 375 return $output; 376 } 377 378 /** 379 * Displays the post excerpt. 380 * 381 * @since 0.71 382 */ 383 function the_excerpt() { 384 385 /** 386 * Filters the displayed post excerpt. 387 * 388 * @since 0.71 389 * 390 * @see get_the_excerpt() 391 * 392 * @param string $post_excerpt The post excerpt. 393 */ 394 echo apply_filters( 'the_excerpt', get_the_excerpt() ); 395 } 396 397 /** 398 * Retrieves the post excerpt. 399 * 400 * @since 0.71 401 * @since 4.5.0 Introduced the `$post` parameter. 402 * 403 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. 404 * @return string Post excerpt. 405 */ 406 function get_the_excerpt( $post = null ) { 407 if ( is_bool( $post ) ) { 408 _deprecated_argument( __FUNCTION__, '2.3.0' ); 409 } 410 411 $post = get_post( $post ); 412 if ( empty( $post ) ) { 413 return ''; 414 } 415 416 if ( post_password_required( $post ) ) { 417 return __( 'There is no excerpt because this is a protected post.' ); 418 } 419 420 /** 421 * Filters the retrieved post excerpt. 422 * 423 * @since 1.2.0 424 * @since 4.5.0 Introduced the `$post` parameter. 425 * 426 * @param string $post_excerpt The post excerpt. 427 * @param WP_Post $post Post object. 428 */ 429 return apply_filters( 'get_the_excerpt', $post->post_excerpt, $post ); 430 } 431 432 /** 433 * Determines whether the post has a custom excerpt. 434 * 435 * For more information on this and similar theme functions, check out 436 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 437 * Conditional Tags} article in the Theme Developer Handbook. 438 * 439 * @since 2.3.0 440 * 441 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. 442 * @return bool True if the post has a custom excerpt, false otherwise. 443 */ 444 function has_excerpt( $post = 0 ) { 445 $post = get_post( $post ); 446 return ( ! empty( $post->post_excerpt ) ); 447 } 448 449 /** 450 * Displays the classes for the post container element. 451 * 452 * @since 2.7.0 453 * 454 * @param string|string[] $class One or more classes to add to the class list. 455 * @param int|WP_Post $post_id Optional. Post ID or post object. Defaults to the global `$post`. 456 */ 457 function post_class( $class = '', $post_id = null ) { 458 // Separates classes with a single space, collates classes for post DIV. 459 echo 'class="' . esc_attr( implode( ' ', get_post_class( $class, $post_id ) ) ) . '"'; 460 } 461 462 /** 463 * Retrieves an array of the class names for the post container element. 464 * 465 * The class names are many. If the post is a sticky, then the 'sticky' 466 * class name. The class 'hentry' is always added to each post. If the post has a 467 * post thumbnail, 'has-post-thumbnail' is added as a class. For each taxonomy that 468 * the post belongs to, a class will be added of the format '{$taxonomy}-{$slug}' - 469 * eg 'category-foo' or 'my_custom_taxonomy-bar'. 470 * 471 * The 'post_tag' taxonomy is a special 472 * case; the class has the 'tag-' prefix instead of 'post_tag-'. All class names are 473 * passed through the filter, {@see 'post_class'}, with the list of class names, followed by 474 * $class parameter value, with the post ID as the last parameter. 475 * 476 * @since 2.7.0 477 * @since 4.2.0 Custom taxonomy class names were added. 478 * 479 * @param string|string[] $class Space-separated string or array of class names to add to the class list. 480 * @param int|WP_Post $post_id Optional. Post ID or post object. 481 * @return string[] Array of class names. 482 */ 483 function get_post_class( $class = '', $post_id = null ) { 484 $post = get_post( $post_id ); 485 486 $classes = array(); 487 488 if ( $class ) { 489 if ( ! is_array( $class ) ) { 490 $class = preg_split( '#\s+#', $class ); 491 } 492 $classes = array_map( 'esc_attr', $class ); 493 } else { 494 // Ensure that we always coerce class to being an array. 495 $class = array(); 496 } 497 498 if ( ! $post ) { 499 return $classes; 500 } 501 502 $classes[] = 'post-' . $post->ID; 503 if ( ! is_admin() ) { 504 $classes[] = $post->post_type; 505 } 506 $classes[] = 'type-' . $post->post_type; 507 $classes[] = 'status-' . $post->post_status; 508 509 // Post Format. 510 if ( post_type_supports( $post->post_type, 'post-formats' ) ) { 511 $post_format = get_post_format( $post->ID ); 512 513 if ( $post_format && ! is_wp_error( $post_format ) ) { 514 $classes[] = 'format-' . sanitize_html_class( $post_format ); 515 } else { 516 $classes[] = 'format-standard'; 517 } 518 } 519 520 $post_password_required = post_password_required( $post->ID ); 521 522 // Post requires password. 523 if ( $post_password_required ) { 524 $classes[] = 'post-password-required'; 525 } elseif ( ! empty( $post->post_password ) ) { 526 $classes[] = 'post-password-protected'; 527 } 528 529 // Post thumbnails. 530 if ( current_theme_supports( 'post-thumbnails' ) && has_post_thumbnail( $post->ID ) && ! is_attachment( $post ) && ! $post_password_required ) { 531 $classes[] = 'has-post-thumbnail'; 532 } 533 534 // Sticky for Sticky Posts. 535 if ( is_sticky( $post->ID ) ) { 536 if ( is_home() && ! is_paged() ) { 537 $classes[] = 'sticky'; 538 } elseif ( is_admin() ) { 539 $classes[] = 'status-sticky'; 540 } 541 } 542 543 // hentry for hAtom compliance. 544 $classes[] = 'hentry'; 545 546 // All public taxonomies. 547 $taxonomies = get_taxonomies( array( 'public' => true ) ); 548 foreach ( (array) $taxonomies as $taxonomy ) { 549 if ( is_object_in_taxonomy( $post->post_type, $taxonomy ) ) { 550 foreach ( (array) get_the_terms( $post->ID, $taxonomy ) as $term ) { 551 if ( empty( $term->slug ) ) { 552 continue; 553 } 554 555 $term_class = sanitize_html_class( $term->slug, $term->term_id ); 556 if ( is_numeric( $term_class ) || ! trim( $term_class, '-' ) ) { 557 $term_class = $term->term_id; 558 } 559 560 // 'post_tag' uses the 'tag' prefix for backward compatibility. 561 if ( 'post_tag' === $taxonomy ) { 562 $classes[] = 'tag-' . $term_class; 563 } else { 564 $classes[] = sanitize_html_class( $taxonomy . '-' . $term_class, $taxonomy . '-' . $term->term_id ); 565 } 566 } 567 } 568 } 569 570 $classes = array_map( 'esc_attr', $classes ); 571 572 /** 573 * Filters the list of CSS class names for the current post. 574 * 575 * @since 2.7.0 576 * 577 * @param string[] $classes An array of post class names. 578 * @param string[] $class An array of additional class names added to the post. 579 * @param int $post_id The post ID. 580 */ 581 $classes = apply_filters( 'post_class', $classes, $class, $post->ID ); 582 583 return array_unique( $classes ); 584 } 585 586 /** 587 * Displays the class names for the body element. 588 * 589 * @since 2.8.0 590 * 591 * @param string|string[] $class Space-separated string or array of class names to add to the class list. 592 */ 593 function body_class( $class = '' ) { 594 // Separates class names with a single space, collates class names for body element. 595 echo 'class="' . esc_attr( implode( ' ', get_body_class( $class ) ) ) . '"'; 596 } 597 598 /** 599 * Retrieves an array of the class names for the body element. 600 * 601 * @since 2.8.0 602 * 603 * @global WP_Query $wp_query WordPress Query object. 604 * 605 * @param string|string[] $class Space-separated string or array of class names to add to the class list. 606 * @return string[] Array of class names. 607 */ 608 function get_body_class( $class = '' ) { 609 global $wp_query; 610 611 $classes = array(); 612 613 if ( is_rtl() ) { 614 $classes[] = 'rtl'; 615 } 616 617 if ( is_front_page() ) { 618 $classes[] = 'home'; 619 } 620 if ( is_home() ) { 621 $classes[] = 'blog'; 622 } 623 if ( is_privacy_policy() ) { 624 $classes[] = 'privacy-policy'; 625 } 626 if ( is_archive() ) { 627 $classes[] = 'archive'; 628 } 629 if ( is_date() ) { 630 $classes[] = 'date'; 631 } 632 if ( is_search() ) { 633 $classes[] = 'search'; 634 $classes[] = $wp_query->posts ? 'search-results' : 'search-no-results'; 635 } 636 if ( is_paged() ) { 637 $classes[] = 'paged'; 638 } 639 if ( is_attachment() ) { 640 $classes[] = 'attachment'; 641 } 642 if ( is_404() ) { 643 $classes[] = 'error404'; 644 } 645 646 if ( is_singular() ) { 647 $post_id = $wp_query->get_queried_object_id(); 648 $post = $wp_query->get_queried_object(); 649 $post_type = $post->post_type; 650 651 if ( is_page_template() ) { 652 $classes[] = "{$post_type}-template"; 653 654 $template_slug = get_page_template_slug( $post_id ); 655 $template_parts = explode( '/', $template_slug ); 656 657 foreach ( $template_parts as $part ) { 658 $classes[] = "{$post_type}-template-" . sanitize_html_class( str_replace( array( '.', '/' ), '-', basename( $part, '.php' ) ) ); 659 } 660 $classes[] = "{$post_type}-template-" . sanitize_html_class( str_replace( '.', '-', $template_slug ) ); 661 } else { 662 $classes[] = "{$post_type}-template-default"; 663 } 664 665 if ( is_single() ) { 666 $classes[] = 'single'; 667 if ( isset( $post->post_type ) ) { 668 $classes[] = 'single-' . sanitize_html_class( $post->post_type, $post_id ); 669 $classes[] = 'postid-' . $post_id; 670 671 // Post Format. 672 if ( post_type_supports( $post->post_type, 'post-formats' ) ) { 673 $post_format = get_post_format( $post->ID ); 674 675 if ( $post_format && ! is_wp_error( $post_format ) ) { 676 $classes[] = 'single-format-' . sanitize_html_class( $post_format ); 677 } else { 678 $classes[] = 'single-format-standard'; 679 } 680 } 681 } 682 } 683 684 if ( is_attachment() ) { 685 $mime_type = get_post_mime_type( $post_id ); 686 $mime_prefix = array( 'application/', 'image/', 'text/', 'audio/', 'video/', 'music/' ); 687 $classes[] = 'attachmentid-' . $post_id; 688 $classes[] = 'attachment-' . str_replace( $mime_prefix, '', $mime_type ); 689 } elseif ( is_page() ) { 690 $classes[] = 'page'; 691 692 $page_id = $wp_query->get_queried_object_id(); 693 694 $post = get_post( $page_id ); 695 696 $classes[] = 'page-id-' . $page_id; 697 698 if ( get_pages( 699 array( 700 'parent' => $page_id, 701 'number' => 1, 702 ) 703 ) ) { 704 $classes[] = 'page-parent'; 705 } 706 707 if ( $post->post_parent ) { 708 $classes[] = 'page-child'; 709 $classes[] = 'parent-pageid-' . $post->post_parent; 710 } 711 } 712 } elseif ( is_archive() ) { 713 if ( is_post_type_archive() ) { 714 $classes[] = 'post-type-archive'; 715 $post_type = get_query_var( 'post_type' ); 716 if ( is_array( $post_type ) ) { 717 $post_type = reset( $post_type ); 718 } 719 $classes[] = 'post-type-archive-' . sanitize_html_class( $post_type ); 720 } elseif ( is_author() ) { 721 $author = $wp_query->get_queried_object(); 722 $classes[] = 'author'; 723 if ( isset( $author->user_nicename ) ) { 724 $classes[] = 'author-' . sanitize_html_class( $author->user_nicename, $author->ID ); 725 $classes[] = 'author-' . $author->ID; 726 } 727 } elseif ( is_category() ) { 728 $cat = $wp_query->get_queried_object(); 729 $classes[] = 'category'; 730 if ( isset( $cat->term_id ) ) { 731 $cat_class = sanitize_html_class( $cat->slug, $cat->term_id ); 732 if ( is_numeric( $cat_class ) || ! trim( $cat_class, '-' ) ) { 733 $cat_class = $cat->term_id; 734 } 735 736 $classes[] = 'category-' . $cat_class; 737 $classes[] = 'category-' . $cat->term_id; 738 } 739 } elseif ( is_tag() ) { 740 $tag = $wp_query->get_queried_object(); 741 $classes[] = 'tag'; 742 if ( isset( $tag->term_id ) ) { 743 $tag_class = sanitize_html_class( $tag->slug, $tag->term_id ); 744 if ( is_numeric( $tag_class ) || ! trim( $tag_class, '-' ) ) { 745 $tag_class = $tag->term_id; 746 } 747 748 $classes[] = 'tag-' . $tag_class; 749 $classes[] = 'tag-' . $tag->term_id; 750 } 751 } elseif ( is_tax() ) { 752 $term = $wp_query->get_queried_object(); 753 if ( isset( $term->term_id ) ) { 754 $term_class = sanitize_html_class( $term->slug, $term->term_id ); 755 if ( is_numeric( $term_class ) || ! trim( $term_class, '-' ) ) { 756 $term_class = $term->term_id; 757 } 758 759 $classes[] = 'tax-' . sanitize_html_class( $term->taxonomy ); 760 $classes[] = 'term-' . $term_class; 761 $classes[] = 'term-' . $term->term_id; 762 } 763 } 764 } 765 766 if ( is_user_logged_in() ) { 767 $classes[] = 'logged-in'; 768 } 769 770 if ( is_admin_bar_showing() ) { 771 $classes[] = 'admin-bar'; 772 $classes[] = 'no-customize-support'; 773 } 774 775 if ( current_theme_supports( 'custom-background' ) 776 && ( get_background_color() !== get_theme_support( 'custom-background', 'default-color' ) || get_background_image() ) ) { 777 $classes[] = 'custom-background'; 778 } 779 780 if ( has_custom_logo() ) { 781 $classes[] = 'wp-custom-logo'; 782 } 783 784 if ( current_theme_supports( 'responsive-embeds' ) ) { 785 $classes[] = 'wp-embed-responsive'; 786 } 787 788 $page = $wp_query->get( 'page' ); 789 790 if ( ! $page || $page < 2 ) { 791 $page = $wp_query->get( 'paged' ); 792 } 793 794 if ( $page && $page > 1 && ! is_404() ) { 795 $classes[] = 'paged-' . $page; 796 797 if ( is_single() ) { 798 $classes[] = 'single-paged-' . $page; 799 } elseif ( is_page() ) { 800 $classes[] = 'page-paged-' . $page; 801 } elseif ( is_category() ) { 802 $classes[] = 'category-paged-' . $page; 803 } elseif ( is_tag() ) { 804 $classes[] = 'tag-paged-' . $page; 805 } elseif ( is_date() ) { 806 $classes[] = 'date-paged-' . $page; 807 } elseif ( is_author() ) { 808 $classes[] = 'author-paged-' . $page; 809 } elseif ( is_search() ) { 810 $classes[] = 'search-paged-' . $page; 811 } elseif ( is_post_type_archive() ) { 812 $classes[] = 'post-type-paged-' . $page; 813 } 814 } 815 816 if ( ! empty( $class ) ) { 817 if ( ! is_array( $class ) ) { 818 $class = preg_split( '#\s+#', $class ); 819 } 820 $classes = array_merge( $classes, $class ); 821 } else { 822 // Ensure that we always coerce class to being an array. 823 $class = array(); 824 } 825 826 $classes = array_map( 'esc_attr', $classes ); 827 828 /** 829 * Filters the list of CSS body class names for the current post or page. 830 * 831 * @since 2.8.0 832 * 833 * @param string[] $classes An array of body class names. 834 * @param string[] $class An array of additional class names added to the body. 835 */ 836 $classes = apply_filters( 'body_class', $classes, $class ); 837 838 return array_unique( $classes ); 839 } 840 841 /** 842 * Determines whether the post requires password and whether a correct password has been provided. 843 * 844 * @since 2.7.0 845 * 846 * @param int|WP_Post|null $post An optional post. Global $post used if not provided. 847 * @return bool false if a password is not required or the correct password cookie is present, true otherwise. 848 */ 849 function post_password_required( $post = null ) { 850 $post = get_post( $post ); 851 852 if ( empty( $post->post_password ) ) { 853 /** This filter is documented in wp-includes/post-template.php */ 854 return apply_filters( 'post_password_required', false, $post ); 855 } 856 857 if ( ! isset( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] ) ) { 858 /** This filter is documented in wp-includes/post-template.php */ 859 return apply_filters( 'post_password_required', true, $post ); 860 } 861 862 require_once ABSPATH . WPINC . '/class-phpass.php'; 863 $hasher = new PasswordHash( 8, true ); 864 865 $hash = wp_unslash( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] ); 866 if ( 0 !== strpos( $hash, '$P$B' ) ) { 867 $required = true; 868 } else { 869 $required = ! $hasher->CheckPassword( $post->post_password, $hash ); 870 } 871 872 /** 873 * Filters whether a post requires the user to supply a password. 874 * 875 * @since 4.7.0 876 * 877 * @param bool $required Whether the user needs to supply a password. True if password has not been 878 * provided or is incorrect, false if password has been supplied or is not required. 879 * @param WP_Post $post Post object. 880 */ 881 return apply_filters( 'post_password_required', $required, $post ); 882 } 883 884 // 885 // Page Template Functions for usage in Themes. 886 // 887 888 /** 889 * The formatted output of a list of pages. 890 * 891 * Displays page links for paginated posts (i.e. including the `<!--nextpage-->` 892 * Quicktag one or more times). This tag must be within The Loop. 893 * 894 * @since 1.2.0 895 * @since 5.1.0 Added the `aria_current` argument. 896 * 897 * @global int $page 898 * @global int $numpages 899 * @global int $multipage 900 * @global int $more 901 * 902 * @param string|array $args { 903 * Optional. Array or string of default arguments. 904 * 905 * @type string $before HTML or text to prepend to each link. Default is `<p> Pages:`. 906 * @type string $after HTML or text to append to each link. Default is `</p>`. 907 * @type string $link_before HTML or text to prepend to each link, inside the `<a>` tag. 908 * Also prepended to the current item, which is not linked. Default empty. 909 * @type string $link_after HTML or text to append to each Pages link inside the `<a>` tag. 910 * Also appended to the current item, which is not linked. Default empty. 911 * @type string $aria_current The value for the aria-current attribute. Possible values are 'page', 912 * 'step', 'location', 'date', 'time', 'true', 'false'. Default is 'page'. 913 * @type string $next_or_number Indicates whether page numbers should be used. Valid values are number 914 * and next. Default is 'number'. 915 * @type string $separator Text between pagination links. Default is ' '. 916 * @type string $nextpagelink Link text for the next page link, if available. Default is 'Next Page'. 917 * @type string $previouspagelink Link text for the previous page link, if available. Default is 'Previous Page'. 918 * @type string $pagelink Format string for page numbers. The % in the parameter string will be 919 * replaced with the page number, so 'Page %' generates "Page 1", "Page 2", etc. 920 * Defaults to '%', just the page number. 921 * @type int|bool $echo Whether to echo or not. Accepts 1|true or 0|false. Default 1|true. 922 * } 923 * @return string Formatted output in HTML. 924 */ 925 function wp_link_pages( $args = '' ) { 926 global $page, $numpages, $multipage, $more; 927 928 $defaults = array( 929 'before' => '<p class="post-nav-links">' . __( 'Pages:' ), 930 'after' => '</p>', 931 'link_before' => '', 932 'link_after' => '', 933 'aria_current' => 'page', 934 'next_or_number' => 'number', 935 'separator' => ' ', 936 'nextpagelink' => __( 'Next page' ), 937 'previouspagelink' => __( 'Previous page' ), 938 'pagelink' => '%', 939 'echo' => 1, 940 ); 941 942 $parsed_args = wp_parse_args( $args, $defaults ); 943 944 /** 945 * Filters the arguments used in retrieving page links for paginated posts. 946 * 947 * @since 3.0.0 948 * 949 * @param array $parsed_args An array of page link arguments. See wp_link_pages() 950 * for information on accepted arguments. 951 */ 952 $parsed_args = apply_filters( 'wp_link_pages_args', $parsed_args ); 953 954 $output = ''; 955 if ( $multipage ) { 956 if ( 'number' === $parsed_args['next_or_number'] ) { 957 $output .= $parsed_args['before']; 958 for ( $i = 1; $i <= $numpages; $i++ ) { 959 $link = $parsed_args['link_before'] . str_replace( '%', $i, $parsed_args['pagelink'] ) . $parsed_args['link_after']; 960 if ( $i != $page || ! $more && 1 == $page ) { 961 $link = _wp_link_page( $i ) . $link . '</a>'; 962 } elseif ( $i === $page ) { 963 $link = '<span class="post-page-numbers current" aria-current="' . esc_attr( $parsed_args['aria_current'] ) . '">' . $link . '</span>'; 964 } 965 /** 966 * Filters the HTML output of individual page number links. 967 * 968 * @since 3.6.0 969 * 970 * @param string $link The page number HTML output. 971 * @param int $i Page number for paginated posts' page links. 972 */ 973 $link = apply_filters( 'wp_link_pages_link', $link, $i ); 974 975 // Use the custom links separator beginning with the second link. 976 $output .= ( 1 === $i ) ? ' ' : $parsed_args['separator']; 977 $output .= $link; 978 } 979 $output .= $parsed_args['after']; 980 } elseif ( $more ) { 981 $output .= $parsed_args['before']; 982 $prev = $page - 1; 983 if ( $prev > 0 ) { 984 $link = _wp_link_page( $prev ) . $parsed_args['link_before'] . $parsed_args['previouspagelink'] . $parsed_args['link_after'] . '</a>'; 985 986 /** This filter is documented in wp-includes/post-template.php */ 987 $output .= apply_filters( 'wp_link_pages_link', $link, $prev ); 988 } 989 $next = $page + 1; 990 if ( $next <= $numpages ) { 991 if ( $prev ) { 992 $output .= $parsed_args['separator']; 993 } 994 $link = _wp_link_page( $next ) . $parsed_args['link_before'] . $parsed_args['nextpagelink'] . $parsed_args['link_after'] . '</a>'; 995 996 /** This filter is documented in wp-includes/post-template.php */ 997 $output .= apply_filters( 'wp_link_pages_link', $link, $next ); 998 } 999 $output .= $parsed_args['after']; 1000 } 1001 } 1002 1003 /** 1004 * Filters the HTML output of page links for paginated posts. 1005 * 1006 * @since 3.6.0 1007 * 1008 * @param string $output HTML output of paginated posts' page links. 1009 * @param array|string $args An array or query string of arguments. See wp_link_pages() 1010 * for information on accepted arguments. 1011 */ 1012 $html = apply_filters( 'wp_link_pages', $output, $args ); 1013 1014 if ( $parsed_args['echo'] ) { 1015 echo $html; 1016 } 1017 return $html; 1018 } 1019 1020 /** 1021 * Helper function for wp_link_pages(). 1022 * 1023 * @since 3.1.0 1024 * @access private 1025 * 1026 * @global WP_Rewrite $wp_rewrite WordPress rewrite component. 1027 * 1028 * @param int $i Page number. 1029 * @return string Link. 1030 */ 1031 function _wp_link_page( $i ) { 1032 global $wp_rewrite; 1033 $post = get_post(); 1034 $query_args = array(); 1035 1036 if ( 1 == $i ) { 1037 $url = get_permalink(); 1038 } else { 1039 if ( ! get_option( 'permalink_structure' ) || in_array( $post->post_status, array( 'draft', 'pending' ), true ) ) { 1040 $url = add_query_arg( 'page', $i, get_permalink() ); 1041 } elseif ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post->ID ) { 1042 $url = trailingslashit( get_permalink() ) . user_trailingslashit( "$wp_rewrite->pagination_base/" . $i, 'single_paged' ); 1043 } else { 1044 $url = trailingslashit( get_permalink() ) . user_trailingslashit( $i, 'single_paged' ); 1045 } 1046 } 1047 1048 if ( is_preview() ) { 1049 1050 if ( ( 'draft' !== $post->post_status ) && isset( $_GET['preview_id'], $_GET['preview_nonce'] ) ) { 1051 $query_args['preview_id'] = wp_unslash( $_GET['preview_id'] ); 1052 $query_args['preview_nonce'] = wp_unslash( $_GET['preview_nonce'] ); 1053 } 1054 1055 $url = get_preview_post_link( $post, $query_args, $url ); 1056 } 1057 1058 return '<a href="' . esc_url( $url ) . '" class="post-page-numbers">'; 1059 } 1060 1061 // 1062 // Post-meta: Custom per-post fields. 1063 // 1064 1065 /** 1066 * Retrieves post custom meta data field. 1067 * 1068 * @since 1.5.0 1069 * 1070 * @param string $key Meta data key name. 1071 * @return array|string|false Array of values, or single value if only one element exists. 1072 * False if the key does not exist. 1073 */ 1074 function post_custom( $key = '' ) { 1075 $custom = get_post_custom(); 1076 1077 if ( ! isset( $custom[ $key ] ) ) { 1078 return false; 1079 } elseif ( 1 === count( $custom[ $key ] ) ) { 1080 return $custom[ $key ][0]; 1081 } else { 1082 return $custom[ $key ]; 1083 } 1084 } 1085 1086 /** 1087 * Displays a list of post custom fields. 1088 * 1089 * @since 1.2.0 1090 * 1091 * @internal This will probably change at some point... 1092 */ 1093 function the_meta() { 1094 $keys = get_post_custom_keys(); 1095 if ( $keys ) { 1096 $li_html = ''; 1097 foreach ( (array) $keys as $key ) { 1098 $keyt = trim( $key ); 1099 if ( is_protected_meta( $keyt, 'post' ) ) { 1100 continue; 1101 } 1102 1103 $values = array_map( 'trim', get_post_custom_values( $key ) ); 1104 $value = implode( ', ', $values ); 1105 1106 $html = sprintf( 1107 "<li><span class='post-meta-key'>%s</span> %s</li>\n", 1108 /* translators: %s: Post custom field name. */ 1109 sprintf( _x( '%s:', 'Post custom field name' ), $key ), 1110 $value 1111 ); 1112 1113 /** 1114 * Filters the HTML output of the li element in the post custom fields list. 1115 * 1116 * @since 2.2.0 1117 * 1118 * @param string $html The HTML output for the li element. 1119 * @param string $key Meta key. 1120 * @param string $value Meta value. 1121 */ 1122 $li_html .= apply_filters( 'the_meta_key', $html, $key, $value ); 1123 } 1124 1125 if ( $li_html ) { 1126 echo "<ul class='post-meta'>\n{$li_html}</ul>\n"; 1127 } 1128 } 1129 } 1130 1131 // 1132 // Pages. 1133 // 1134 1135 /** 1136 * Retrieves or displays a list of pages as a dropdown (select list). 1137 * 1138 * @since 2.1.0 1139 * @since 4.2.0 The `$value_field` argument was added. 1140 * @since 4.3.0 The `$class` argument was added. 1141 * 1142 * @see get_pages() 1143 * 1144 * @param array|string $args { 1145 * Optional. Array or string of arguments to generate a page dropdown. See `get_pages()` for additional arguments. 1146 * 1147 * @type int $depth Maximum depth. Default 0. 1148 * @type int $child_of Page ID to retrieve child pages of. Default 0. 1149 * @type int|string $selected Value of the option that should be selected. Default 0. 1150 * @type bool|int $echo Whether to echo or return the generated markup. Accepts 0, 1, 1151 * or their bool equivalents. Default 1. 1152 * @type string $name Value for the 'name' attribute of the select element. 1153 * Default 'page_id'. 1154 * @type string $id Value for the 'id' attribute of the select element. 1155 * @type string $class Value for the 'class' attribute of the select element. Default: none. 1156 * Defaults to the value of `$name`. 1157 * @type string $show_option_none Text to display for showing no pages. Default empty (does not display). 1158 * @type string $show_option_no_change Text to display for "no change" option. Default empty (does not display). 1159 * @type string $option_none_value Value to use when no page is selected. Default empty. 1160 * @type string $value_field Post field used to populate the 'value' attribute of the option 1161 * elements. Accepts any valid post field. Default 'ID'. 1162 * } 1163 * @return string HTML dropdown list of pages. 1164 */ 1165 function wp_dropdown_pages( $args = '' ) { 1166 $defaults = array( 1167 'depth' => 0, 1168 'child_of' => 0, 1169 'selected' => 0, 1170 'echo' => 1, 1171 'name' => 'page_id', 1172 'id' => '', 1173 'class' => '', 1174 'show_option_none' => '', 1175 'show_option_no_change' => '', 1176 'option_none_value' => '', 1177 'value_field' => 'ID', 1178 ); 1179 1180 $parsed_args = wp_parse_args( $args, $defaults ); 1181 1182 $pages = get_pages( $parsed_args ); 1183 $output = ''; 1184 // Back-compat with old system where both id and name were based on $name argument. 1185 if ( empty( $parsed_args['id'] ) ) { 1186 $parsed_args['id'] = $parsed_args['name']; 1187 } 1188 1189 if ( ! empty( $pages ) ) { 1190 $class = ''; 1191 if ( ! empty( $parsed_args['class'] ) ) { 1192 $class = " class='" . esc_attr( $parsed_args['class'] ) . "'"; 1193 } 1194 1195 $output = "<select name='" . esc_attr( $parsed_args['name'] ) . "'" . $class . " id='" . esc_attr( $parsed_args['id'] ) . "'>\n"; 1196 if ( $parsed_args['show_option_no_change'] ) { 1197 $output .= "\t<option value=\"-1\">" . $parsed_args['show_option_no_change'] . "</option>\n"; 1198 } 1199 if ( $parsed_args['show_option_none'] ) { 1200 $output .= "\t<option value=\"" . esc_attr( $parsed_args['option_none_value'] ) . '">' . $parsed_args['show_option_none'] . "</option>\n"; 1201 } 1202 $output .= walk_page_dropdown_tree( $pages, $parsed_args['depth'], $parsed_args ); 1203 $output .= "</select>\n"; 1204 } 1205 1206 /** 1207 * Filters the HTML output of a list of pages as a drop down. 1208 * 1209 * @since 2.1.0 1210 * @since 4.4.0 `$parsed_args` and `$pages` added as arguments. 1211 * 1212 * @param string $output HTML output for drop down list of pages. 1213 * @param array $parsed_args The parsed arguments array. See wp_dropdown_pages() 1214 * for information on accepted arguments. 1215 * @param WP_Post[] $pages Array of the page objects. 1216 */ 1217 $html = apply_filters( 'wp_dropdown_pages', $output, $parsed_args, $pages ); 1218 1219 if ( $parsed_args['echo'] ) { 1220 echo $html; 1221 } 1222 1223 return $html; 1224 } 1225 1226 /** 1227 * Retrieves or displays a list of pages (or hierarchical post type items) in list (li) format. 1228 * 1229 * @since 1.5.0 1230 * @since 4.7.0 Added the `item_spacing` argument. 1231 * 1232 * @see get_pages() 1233 * 1234 * @global WP_Query $wp_query WordPress Query object. 1235 * 1236 * @param array|string $args { 1237 * Optional. Array or string of arguments to generate a list of pages. See `get_pages()` for additional arguments. 1238 * 1239 * @type int $child_of Display only the sub-pages of a single page by ID. Default 0 (all pages). 1240 * @type string $authors Comma-separated list of author IDs. Default empty (all authors). 1241 * @type string $date_format PHP date format to use for the listed pages. Relies on the 'show_date' parameter. 1242 * Default is the value of 'date_format' option. 1243 * @type int $depth Number of levels in the hierarchy of pages to include in the generated list. 1244 * Accepts -1 (any depth), 0 (all pages), 1 (top-level pages only), and n (pages to 1245 * the given n depth). Default 0. 1246 * @type bool $echo Whether or not to echo the list of pages. Default true. 1247 * @type string $exclude Comma-separated list of page IDs to exclude. Default empty. 1248 * @type array $include Comma-separated list of page IDs to include. Default empty. 1249 * @type string $link_after Text or HTML to follow the page link label. Default null. 1250 * @type string $link_before Text or HTML to precede the page link label. Default null. 1251 * @type string $post_type Post type to query for. Default 'page'. 1252 * @type string|array $post_status Comma-separated list or array of post statuses to include. Default 'publish'. 1253 * @type string $show_date Whether to display the page publish or modified date for each page. Accepts 1254 * 'modified' or any other value. An empty value hides the date. Default empty. 1255 * @type string $sort_column Comma-separated list of column names to sort the pages by. Accepts 'post_author', 1256 * 'post_date', 'post_title', 'post_name', 'post_modified', 'post_modified_gmt', 1257 * 'menu_order', 'post_parent', 'ID', 'rand', or 'comment_count'. Default 'post_title'. 1258 * @type string $title_li List heading. Passing a null or empty value will result in no heading, and the list 1259 * will not be wrapped with unordered list `<ul>` tags. Default 'Pages'. 1260 * @type string $item_spacing Whether to preserve whitespace within the menu's HTML. Accepts 'preserve' or 'discard'. 1261 * Default 'preserve'. 1262 * @type Walker $walker Walker instance to use for listing pages. Default empty which results in a 1263 * Walker_Page instance being used. 1264 * } 1265 * @return void|string Void if 'echo' argument is true, HTML list of pages if 'echo' is false. 1266 */ 1267 function wp_list_pages( $args = '' ) { 1268 $defaults = array( 1269 'depth' => 0, 1270 'show_date' => '', 1271 'date_format' => get_option( 'date_format' ), 1272 'child_of' => 0, 1273 'exclude' => '', 1274 'title_li' => __( 'Pages' ), 1275 'echo' => 1, 1276 'authors' => '', 1277 'sort_column' => 'menu_order, post_title', 1278 'link_before' => '', 1279 'link_after' => '', 1280 'item_spacing' => 'preserve', 1281 'walker' => '', 1282 ); 1283 1284 $parsed_args = wp_parse_args( $args, $defaults ); 1285 1286 if ( ! in_array( $parsed_args['item_spacing'], array( 'preserve', 'discard' ), true ) ) { 1287 // Invalid value, fall back to default. 1288 $parsed_args['item_spacing'] = $defaults['item_spacing']; 1289 } 1290 1291 $output = ''; 1292 $current_page = 0; 1293 1294 // Sanitize, mostly to keep spaces out. 1295 $parsed_args['exclude'] = preg_replace( '/[^0-9,]/', '', $parsed_args['exclude'] ); 1296 1297 // Allow plugins to filter an array of excluded pages (but don't put a nullstring into the array). 1298 $exclude_array = ( $parsed_args['exclude'] ) ? explode( ',', $parsed_args['exclude'] ) : array(); 1299 1300 /** 1301 * Filters the array of pages to exclude from the pages list. 1302 * 1303 * @since 2.1.0 1304 * 1305 * @param string[] $exclude_array An array of page IDs to exclude. 1306 */ 1307 $parsed_args['exclude'] = implode( ',', apply_filters( 'wp_list_pages_excludes', $exclude_array ) ); 1308 1309 $parsed_args['hierarchical'] = 0; 1310 1311 // Query pages. 1312 $pages = get_pages( $parsed_args ); 1313 1314 if ( ! empty( $pages ) ) { 1315 if ( $parsed_args['title_li'] ) { 1316 $output .= '<li class="pagenav">' . $parsed_args['title_li'] . '<ul>'; 1317 } 1318 global $wp_query; 1319 if ( is_page() || is_attachment() || $wp_query->is_posts_page ) { 1320 $current_page = get_queried_object_id(); 1321 } elseif ( is_singular() ) { 1322 $queried_object = get_queried_object(); 1323 if ( is_post_type_hierarchical( $queried_object->post_type ) ) { 1324 $current_page = $queried_object->ID; 1325 } 1326 } 1327 1328 $output .= walk_page_tree( $pages, $parsed_args['depth'], $current_page, $parsed_args ); 1329 1330 if ( $parsed_args['title_li'] ) { 1331 $output .= '</ul></li>'; 1332 } 1333 } 1334 1335 /** 1336 * Filters the HTML output of the pages to list. 1337 * 1338 * @since 1.5.1 1339 * @since 4.4.0 `$pages` added as arguments. 1340 * 1341 * @see wp_list_pages() 1342 * 1343 * @param string $output HTML output of the pages list. 1344 * @param array $parsed_args An array of page-listing arguments. See wp_list_pages() 1345 * for information on accepted arguments. 1346 * @param WP_Post[] $pages Array of the page objects. 1347 */ 1348 $html = apply_filters( 'wp_list_pages', $output, $parsed_args, $pages ); 1349 1350 if ( $parsed_args['echo'] ) { 1351 echo $html; 1352 } else { 1353 return $html; 1354 } 1355 } 1356 1357 /** 1358 * Displays or retrieves a list of pages with an optional home link. 1359 * 1360 * The arguments are listed below and part of the arguments are for wp_list_pages() function. 1361 * Check that function for more info on those arguments. 1362 * 1363 * @since 2.7.0 1364 * @since 4.4.0 Added `menu_id`, `container`, `before`, `after`, and `walker` arguments. 1365 * @since 4.7.0 Added the `item_spacing` argument. 1366 * 1367 * @param array|string $args { 1368 * Optional. Array or string of arguments to generate a page menu. See `wp_list_pages()` for additional arguments. 1369 * 1370 * @type string $sort_column How to sort the list of pages. Accepts post column names. 1371 * Default 'menu_order, post_title'. 1372 * @type string $menu_id ID for the div containing the page list. Default is empty string. 1373 * @type string $menu_class Class to use for the element containing the page list. Default 'menu'. 1374 * @type string $container Element to use for the element containing the page list. Default 'div'. 1375 * @type bool $echo Whether to echo the list or return it. Accepts true (echo) or false (return). 1376 * Default true. 1377 * @type int|bool|string $show_home Whether to display the link to the home page. Can just enter the text 1378 * you'd like shown for the home link. 1|true defaults to 'Home'. 1379 * @type string $link_before The HTML or text to prepend to $show_home text. Default empty. 1380 * @type string $link_after The HTML or text to append to $show_home text. Default empty. 1381 * @type string $before The HTML or text to prepend to the menu. Default is '<ul>'. 1382 * @type string $after The HTML or text to append to the menu. Default is '</ul>'. 1383 * @type string $item_spacing Whether to preserve whitespace within the menu's HTML. Accepts 'preserve' 1384 * or 'discard'. Default 'discard'. 1385 * @type Walker $walker Walker instance to use for listing pages. Default empty which results in a 1386 * Walker_Page instance being used. 1387 * } 1388 * @return void|string Void if 'echo' argument is true, HTML menu if 'echo' is false. 1389 */ 1390 function wp_page_menu( $args = array() ) { 1391 $defaults = array( 1392 'sort_column' => 'menu_order, post_title', 1393 'menu_id' => '', 1394 'menu_class' => 'menu', 1395 'container' => 'div', 1396 'echo' => true, 1397 'link_before' => '', 1398 'link_after' => '', 1399 'before' => '<ul>', 1400 'after' => '</ul>', 1401 'item_spacing' => 'discard', 1402 'walker' => '', 1403 ); 1404 $args = wp_parse_args( $args, $defaults ); 1405 1406 if ( ! in_array( $args['item_spacing'], array( 'preserve', 'discard' ), true ) ) { 1407 // Invalid value, fall back to default. 1408 $args['item_spacing'] = $defaults['item_spacing']; 1409 } 1410 1411 if ( 'preserve' === $args['item_spacing'] ) { 1412 $t = "\t"; 1413 $n = "\n"; 1414 } else { 1415 $t = ''; 1416 $n = ''; 1417 } 1418 1419 /** 1420 * Filters the arguments used to generate a page-based menu. 1421 * 1422 * @since 2.7.0 1423 * 1424 * @see wp_page_menu() 1425 * 1426 * @param array $args An array of page menu arguments. See wp_page_menu() 1427 * for information on accepted arguments. 1428 */ 1429 $args = apply_filters( 'wp_page_menu_args', $args ); 1430 1431 $menu = ''; 1432 1433 $list_args = $args; 1434 1435 // Show Home in the menu. 1436 if ( ! empty( $args['show_home'] ) ) { 1437 if ( true === $args['show_home'] || '1' === $args['show_home'] || 1 === $args['show_home'] ) { 1438 $text = __( 'Home' ); 1439 } else { 1440 $text = $args['show_home']; 1441 } 1442 $class = ''; 1443 if ( is_front_page() && ! is_paged() ) { 1444 $class = 'class="current_page_item"'; 1445 } 1446 $menu .= '<li ' . $class . '><a href="' . home_url( '/' ) . '">' . $args['link_before'] . $text . $args['link_after'] . '</a></li>'; 1447 // If the front page is a page, add it to the exclude list. 1448 if ( 'page' === get_option( 'show_on_front' ) ) { 1449 if ( ! empty( $list_args['exclude'] ) ) { 1450 $list_args['exclude'] .= ','; 1451 } else { 1452 $list_args['exclude'] = ''; 1453 } 1454 $list_args['exclude'] .= get_option( 'page_on_front' ); 1455 } 1456 } 1457 1458 $list_args['echo'] = false; 1459 $list_args['title_li'] = ''; 1460 $menu .= wp_list_pages( $list_args ); 1461 1462 $container = sanitize_text_field( $args['container'] ); 1463 1464 // Fallback in case `wp_nav_menu()` was called without a container. 1465 if ( empty( $container ) ) { 1466 $container = 'div'; 1467 } 1468 1469 if ( $menu ) { 1470 1471 // wp_nav_menu() doesn't set before and after. 1472 if ( isset( $args['fallback_cb'] ) && 1473 'wp_page_menu' === $args['fallback_cb'] && 1474 'ul' !== $container ) { 1475 $args['before'] = "<ul>{$n}"; 1476 $args['after'] = '</ul>'; 1477 } 1478 1479 $menu = $args['before'] . $menu . $args['after']; 1480 } 1481 1482 $attrs = ''; 1483 if ( ! empty( $args['menu_id'] ) ) { 1484 $attrs .= ' id="' . esc_attr( $args['menu_id'] ) . '"'; 1485 } 1486 1487 if ( ! empty( $args['menu_class'] ) ) { 1488 $attrs .= ' class="' . esc_attr( $args['menu_class'] ) . '"'; 1489 } 1490 1491 $menu = "<{$container}{$attrs}>" . $menu . "</{$container}>{$n}"; 1492 1493 /** 1494 * Filters the HTML output of a page-based menu. 1495 * 1496 * @since 2.7.0 1497 * 1498 * @see wp_page_menu() 1499 * 1500 * @param string $menu The HTML output. 1501 * @param array $args An array of arguments. See wp_page_menu() 1502 * for information on accepted arguments. 1503 */ 1504 $menu = apply_filters( 'wp_page_menu', $menu, $args ); 1505 1506 if ( $args['echo'] ) { 1507 echo $menu; 1508 } else { 1509 return $menu; 1510 } 1511 } 1512 1513 // 1514 // Page helpers. 1515 // 1516 1517 /** 1518 * Retrieves HTML list content for page list. 1519 * 1520 * @uses Walker_Page to create HTML list content. 1521 * @since 2.1.0 1522 * 1523 * @param array $pages 1524 * @param int $depth 1525 * @param int $current_page 1526 * @param array $args 1527 * @return string 1528 */ 1529 function walk_page_tree( $pages, $depth, $current_page, $args ) { 1530 if ( empty( $args['walker'] ) ) { 1531 $walker = new Walker_Page; 1532 } else { 1533 /** 1534 * @var Walker $walker 1535 */ 1536 $walker = $args['walker']; 1537 } 1538 1539 foreach ( (array) $pages as $page ) { 1540 if ( $page->post_parent ) { 1541 $args['pages_with_children'][ $page->post_parent ] = true; 1542 } 1543 } 1544 1545 return $walker->walk( $pages, $depth, $args, $current_page ); 1546 } 1547 1548 /** 1549 * Retrieves HTML dropdown (select) content for page list. 1550 * 1551 * @since 2.1.0 1552 * @since 5.3.0 Formalized the existing `...$args` parameter by adding it 1553 * to the function signature. 1554 * 1555 * @uses Walker_PageDropdown to create HTML dropdown content. 1556 * @see Walker_PageDropdown::walk() for parameters and return description. 1557 * 1558 * @param mixed ...$args Elements array, maximum hierarchical depth and optional additional arguments. 1559 * @return string 1560 */ 1561 function walk_page_dropdown_tree( ...$args ) { 1562 if ( empty( $args[2]['walker'] ) ) { // The user's options are the third parameter. 1563 $walker = new Walker_PageDropdown; 1564 } else { 1565 /** 1566 * @var Walker $walker 1567 */ 1568 $walker = $args[2]['walker']; 1569 } 1570 1571 return $walker->walk( ...$args ); 1572 } 1573 1574 // 1575 // Attachments. 1576 // 1577 1578 /** 1579 * Displays an attachment page link using an image or icon. 1580 * 1581 * @since 2.0.0 1582 * 1583 * @param int|WP_Post $id Optional. Post ID or post object. 1584 * @param bool $fullsize Optional. Whether to use full size. Default false. 1585 * @param bool $deprecated Deprecated. Not used. 1586 * @param bool $permalink Optional. Whether to include permalink. Default false. 1587 */ 1588 function the_attachment_link( $id = 0, $fullsize = false, $deprecated = false, $permalink = false ) { 1589 if ( ! empty( $deprecated ) ) { 1590 _deprecated_argument( __FUNCTION__, '2.5.0' ); 1591 } 1592 1593 if ( $fullsize ) { 1594 echo wp_get_attachment_link( $id, 'full', $permalink ); 1595 } else { 1596 echo wp_get_attachment_link( $id, 'thumbnail', $permalink ); 1597 } 1598 } 1599 1600 /** 1601 * Retrieves an attachment page link using an image or icon, if possible. 1602 * 1603 * @since 2.5.0 1604 * @since 4.4.0 The `$id` parameter can now accept either a post ID or `WP_Post` object. 1605 * 1606 * @param int|WP_Post $id Optional. Post ID or post object. 1607 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array 1608 * of width and height values in pixels (in that order). Default 'thumbnail'. 1609 * @param bool $permalink Optional. Whether to add permalink to image. Default false. 1610 * @param bool $icon Optional. Whether the attachment is an icon. Default false. 1611 * @param string|false $text Optional. Link text to use. Activated by passing a string, false otherwise. 1612 * Default false. 1613 * @param array|string $attr Optional. Array or string of attributes. Default empty. 1614 * @return string HTML content. 1615 */ 1616 function wp_get_attachment_link( $id = 0, $size = 'thumbnail', $permalink = false, $icon = false, $text = false, $attr = '' ) { 1617 $_post = get_post( $id ); 1618 1619 if ( empty( $_post ) || ( 'attachment' !== $_post->post_type ) || ! wp_get_attachment_url( $_post->ID ) ) { 1620 return __( 'Missing Attachment' ); 1621 } 1622 1623 $url = wp_get_attachment_url( $_post->ID ); 1624 1625 if ( $permalink ) { 1626 $url = get_attachment_link( $_post->ID ); 1627 } 1628 1629 if ( $text ) { 1630 $link_text = $text; 1631 } elseif ( $size && 'none' !== $size ) { 1632 $link_text = wp_get_attachment_image( $_post->ID, $size, $icon, $attr ); 1633 } else { 1634 $link_text = ''; 1635 } 1636 1637 if ( '' === trim( $link_text ) ) { 1638 $link_text = $_post->post_title; 1639 } 1640 1641 if ( '' === trim( $link_text ) ) { 1642 $link_text = esc_html( pathinfo( get_attached_file( $_post->ID ), PATHINFO_FILENAME ) ); 1643 } 1644 /** 1645 * Filters a retrieved attachment page link. 1646 * 1647 * @since 2.7.0 1648 * @since 5.1.0 Added the `$attr` parameter. 1649 * 1650 * @param string $link_html The page link HTML output. 1651 * @param int|WP_Post $id Post ID or object. Can be 0 for the current global post. 1652 * @param string|int[] $size Requested image size. Can be any registered image size name, or 1653 * an array of width and height values in pixels (in that order). 1654 * @param bool $permalink Whether to add permalink to image. Default false. 1655 * @param bool $icon Whether to include an icon. 1656 * @param string|false $text If string, will be link text. 1657 * @param array|string $attr Array or string of attributes. 1658 */ 1659 return apply_filters( 'wp_get_attachment_link', "<a href='" . esc_url( $url ) . "'>$link_text</a>", $id, $size, $permalink, $icon, $text, $attr ); 1660 } 1661 1662 /** 1663 * Wraps attachment in paragraph tag before content. 1664 * 1665 * @since 2.0.0 1666 * 1667 * @param string $content 1668 * @return string 1669 */ 1670 function prepend_attachment( $content ) { 1671 $post = get_post(); 1672 1673 if ( empty( $post->post_type ) || 'attachment' !== $post->post_type ) { 1674 return $content; 1675 } 1676 1677 if ( wp_attachment_is( 'video', $post ) ) { 1678 $meta = wp_get_attachment_metadata( get_the_ID() ); 1679 $atts = array( 'src' => wp_get_attachment_url() ); 1680 if ( ! empty( $meta['width'] ) && ! empty( $meta['height'] ) ) { 1681 $atts['width'] = (int) $meta['width']; 1682 $atts['height'] = (int) $meta['height']; 1683 } 1684 if ( has_post_thumbnail() ) { 1685 $atts['poster'] = wp_get_attachment_url( get_post_thumbnail_id() ); 1686 } 1687 $p = wp_video_shortcode( $atts ); 1688 } elseif ( wp_attachment_is( 'audio', $post ) ) { 1689 $p = wp_audio_shortcode( array( 'src' => wp_get_attachment_url() ) ); 1690 } else { 1691 $p = '<p class="attachment">'; 1692 // Show the medium sized image representation of the attachment if available, and link to the raw file. 1693 $p .= wp_get_attachment_link( 0, 'medium', false ); 1694 $p .= '</p>'; 1695 } 1696 1697 /** 1698 * Filters the attachment markup to be prepended to the post content. 1699 * 1700 * @since 2.0.0 1701 * 1702 * @see prepend_attachment() 1703 * 1704 * @param string $p The attachment HTML output. 1705 */ 1706 $p = apply_filters( 'prepend_attachment', $p ); 1707 1708 return "$p\n$content"; 1709 } 1710 1711 // 1712 // Misc. 1713 // 1714 1715 /** 1716 * Retrieves protected post password form content. 1717 * 1718 * @since 1.0.0 1719 * 1720 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. 1721 * @return string HTML content for password form for password protected post. 1722 */ 1723 function get_the_password_form( $post = 0 ) { 1724 $post = get_post( $post ); 1725 $label = 'pwbox-' . ( empty( $post->ID ) ? rand() : $post->ID ); 1726 $output = '<form action="' . esc_url( site_url( 'wp-login.php?action=postpass', 'login_post' ) ) . '" class="post-password-form" method="post"> 1727 <p>' . __( 'This content is password protected. To view it please enter your password below:' ) . '</p> 1728 <p><label for="' . $label . '">' . __( 'Password:' ) . ' <input name="post_password" id="' . $label . '" type="password" size="20" /></label> <input type="submit" name="Submit" value="' . esc_attr_x( 'Enter', 'post password form' ) . '" /></p></form> 1729 '; 1730 1731 /** 1732 * Filters the HTML output for the protected post password form. 1733 * 1734 * If modifying the password field, please note that the core database schema 1735 * limits the password field to 20 characters regardless of the value of the 1736 * size attribute in the form input. 1737 * 1738 * @since 2.7.0 1739 * @since 5.8.0 Added the `$post` parameter. 1740 * 1741 * @param string $output The password form HTML output. 1742 * @param WP_Post $post Post object. 1743 */ 1744 return apply_filters( 'the_password_form', $output, $post ); 1745 } 1746 1747 /** 1748 * Determines whether the current post uses a page template. 1749 * 1750 * This template tag allows you to determine if you are in a page template. 1751 * You can optionally provide a template filename or array of template filenames 1752 * and then the check will be specific to that template. 1753 * 1754 * For more information on this and similar theme functions, check out 1755 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 1756 * Conditional Tags} article in the Theme Developer Handbook. 1757 * 1758 * @since 2.5.0 1759 * @since 4.2.0 The `$template` parameter was changed to also accept an array of page templates. 1760 * @since 4.7.0 Now works with any post type, not just pages. 1761 * 1762 * @param string|string[] $template The specific template filename or array of templates to match. 1763 * @return bool True on success, false on failure. 1764 */ 1765 function is_page_template( $template = '' ) { 1766 if ( ! is_singular() ) { 1767 return false; 1768 } 1769 1770 $page_template = get_page_template_slug( get_queried_object_id() ); 1771 1772 if ( empty( $template ) ) { 1773 return (bool) $page_template; 1774 } 1775 1776 if ( $template == $page_template ) { 1777 return true; 1778 } 1779 1780 if ( is_array( $template ) ) { 1781 if ( ( in_array( 'default', $template, true ) && ! $page_template ) 1782 || in_array( $page_template, $template, true ) 1783 ) { 1784 return true; 1785 } 1786 } 1787 1788 return ( 'default' === $template && ! $page_template ); 1789 } 1790 1791 /** 1792 * Gets the specific template filename for a given post. 1793 * 1794 * @since 3.4.0 1795 * @since 4.7.0 Now works with any post type, not just pages. 1796 * 1797 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. 1798 * @return string|false Page template filename. Returns an empty string when the default page template 1799 * is in use. Returns false if the post does not exist. 1800 */ 1801 function get_page_template_slug( $post = null ) { 1802 $post = get_post( $post ); 1803 1804 if ( ! $post ) { 1805 return false; 1806 } 1807 1808 $template = get_post_meta( $post->ID, '_wp_page_template', true ); 1809 1810 if ( ! $template || 'default' === $template ) { 1811 return ''; 1812 } 1813 1814 return $template; 1815 } 1816 1817 /** 1818 * Retrieves formatted date timestamp of a revision (linked to that revisions's page). 1819 * 1820 * @since 2.6.0 1821 * 1822 * @param int|object $revision Revision ID or revision object. 1823 * @param bool $link Optional. Whether to link to revision's page. Default true. 1824 * @return string|false i18n formatted datetimestamp or localized 'Current Revision'. 1825 */ 1826 function wp_post_revision_title( $revision, $link = true ) { 1827 $revision = get_post( $revision ); 1828 if ( ! $revision ) { 1829 return $revision; 1830 } 1831 1832 if ( ! in_array( $revision->post_type, array( 'post', 'page', 'revision' ), true ) ) { 1833 return false; 1834 } 1835 1836 /* translators: Revision date format, see https://www.php.net/manual/datetime.format.php */ 1837 $datef = _x( 'F j, Y @ H:i:s', 'revision date format' ); 1838 /* translators: %s: Revision date. */ 1839 $autosavef = __( '%s [Autosave]' ); 1840 /* translators: %s: Revision date. */ 1841 $currentf = __( '%s [Current Revision]' ); 1842 1843 $date = date_i18n( $datef, strtotime( $revision->post_modified ) ); 1844 $edit_link = get_edit_post_link( $revision->ID ); 1845 if ( $link && current_user_can( 'edit_post', $revision->ID ) && $edit_link ) { 1846 $date = "<a href='$edit_link'>$date</a>"; 1847 } 1848 1849 if ( ! wp_is_post_revision( $revision ) ) { 1850 $date = sprintf( $currentf, $date ); 1851 } elseif ( wp_is_post_autosave( $revision ) ) { 1852 $date = sprintf( $autosavef, $date ); 1853 } 1854 1855 return $date; 1856 } 1857 1858 /** 1859 * Retrieves formatted date timestamp of a revision (linked to that revisions's page). 1860 * 1861 * @since 3.6.0 1862 * 1863 * @param int|object $revision Revision ID or revision object. 1864 * @param bool $link Optional. Whether to link to revision's page. Default true. 1865 * @return string|false gravatar, user, i18n formatted datetimestamp or localized 'Current Revision'. 1866 */ 1867 function wp_post_revision_title_expanded( $revision, $link = true ) { 1868 $revision = get_post( $revision ); 1869 if ( ! $revision ) { 1870 return $revision; 1871 } 1872 1873 if ( ! in_array( $revision->post_type, array( 'post', 'page', 'revision' ), true ) ) { 1874 return false; 1875 } 1876 1877 $author = get_the_author_meta( 'display_name', $revision->post_author ); 1878 /* translators: Revision date format, see https://www.php.net/manual/datetime.format.php */ 1879 $datef = _x( 'F j, Y @ H:i:s', 'revision date format' ); 1880 1881 $gravatar = get_avatar( $revision->post_author, 24 ); 1882 1883 $date = date_i18n( $datef, strtotime( $revision->post_modified ) ); 1884 $edit_link = get_edit_post_link( $revision->ID ); 1885 if ( $link && current_user_can( 'edit_post', $revision->ID ) && $edit_link ) { 1886 $date = "<a href='$edit_link'>$date</a>"; 1887 } 1888 1889 $revision_date_author = sprintf( 1890 /* translators: Post revision title. 1: Author avatar, 2: Author name, 3: Time ago, 4: Date. */ 1891 __( '%1$s %2$s, %3$s ago (%4$s)' ), 1892 $gravatar, 1893 $author, 1894 human_time_diff( strtotime( $revision->post_modified_gmt ) ), 1895 $date 1896 ); 1897 1898 /* translators: %s: Revision date with author avatar. */ 1899 $autosavef = __( '%s [Autosave]' ); 1900 /* translators: %s: Revision date with author avatar. */ 1901 $currentf = __( '%s [Current Revision]' ); 1902 1903 if ( ! wp_is_post_revision( $revision ) ) { 1904 $revision_date_author = sprintf( $currentf, $revision_date_author ); 1905 } elseif ( wp_is_post_autosave( $revision ) ) { 1906 $revision_date_author = sprintf( $autosavef, $revision_date_author ); 1907 } 1908 1909 /** 1910 * Filters the formatted author and date for a revision. 1911 * 1912 * @since 4.4.0 1913 * 1914 * @param string $revision_date_author The formatted string. 1915 * @param WP_Post $revision The revision object. 1916 * @param bool $link Whether to link to the revisions page, as passed into 1917 * wp_post_revision_title_expanded(). 1918 */ 1919 return apply_filters( 'wp_post_revision_title_expanded', $revision_date_author, $revision, $link ); 1920 } 1921 1922 /** 1923 * Displays a list of a post's revisions. 1924 * 1925 * Can output either a UL with edit links or a TABLE with diff interface, and 1926 * restore action links. 1927 * 1928 * @since 2.6.0 1929 * 1930 * @param int|WP_Post $post_id Optional. Post ID or WP_Post object. Default is global $post. 1931 * @param string $type 'all' (default), 'revision' or 'autosave' 1932 */ 1933 function wp_list_post_revisions( $post_id = 0, $type = 'all' ) { 1934 $post = get_post( $post_id ); 1935 if ( ! $post ) { 1936 return; 1937 } 1938 1939 // $args array with (parent, format, right, left, type) deprecated since 3.6. 1940 if ( is_array( $type ) ) { 1941 $type = ! empty( $type['type'] ) ? $type['type'] : $type; 1942 _deprecated_argument( __FUNCTION__, '3.6.0' ); 1943 } 1944 1945 $revisions = wp_get_post_revisions( $post->ID ); 1946 if ( ! $revisions ) { 1947 return; 1948 } 1949 1950 $rows = ''; 1951 foreach ( $revisions as $revision ) { 1952 if ( ! current_user_can( 'read_post', $revision->ID ) ) { 1953 continue; 1954 } 1955 1956 $is_autosave = wp_is_post_autosave( $revision ); 1957 if ( ( 'revision' === $type && $is_autosave ) || ( 'autosave' === $type && ! $is_autosave ) ) { 1958 continue; 1959 } 1960 1961 $rows .= "\t<li>" . wp_post_revision_title_expanded( $revision ) . "</li>\n"; 1962 } 1963 1964 echo "<div class='hide-if-js'><p>" . __( 'JavaScript must be enabled to use this feature.' ) . "</p></div>\n"; 1965 1966 echo "<ul class='post-revisions hide-if-no-js'>\n"; 1967 echo $rows; 1968 echo '</ul>'; 1969 } 1970 1971 /** 1972 * Retrieves the parent post object for the given post. 1973 * 1974 * @since 5.7.0 1975 * 1976 * @param int|WP_Post|null $post Optional. Post ID or WP_Post object. Default is global $post. 1977 * @return WP_Post|null Parent post object, or null if there isn't one. 1978 */ 1979 function get_post_parent( $post = null ) { 1980 $wp_post = get_post( $post ); 1981 return ! empty( $wp_post->post_parent ) ? get_post( $wp_post->post_parent ) : null; 1982 } 1983 1984 /** 1985 * Returns whether the given post has a parent post. 1986 * 1987 * @since 5.7.0 1988 * 1989 * @param int|WP_Post|null $post Optional. Post ID or WP_Post object. Default is global $post. 1990 * @return bool Whether the post has a parent post. 1991 */ 1992 function has_post_parent( $post = null ) { 1993 return (bool) get_post_parent( $post ); 1994 }
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