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1 <?php 2 /** 3 * Class for generating SQL clauses that filter a primary query according to date. 4 * 5 * WP_Date_Query is a helper that allows primary query classes, such as WP_Query, to filter 6 * their results by date columns, by generating `WHERE` subclauses to be attached to the 7 * primary SQL query string. 8 * 9 * Attempting to filter by an invalid date value (eg month=13) will generate SQL that will 10 * return no results. In these cases, a _doing_it_wrong() error notice is also thrown. 11 * See WP_Date_Query::validate_date_values(). 12 * 13 * @link https://developer.wordpress.org/reference/classes/wp_query/ 14 * 15 * @since 3.7.0 16 */ 17 class WP_Date_Query { 18 /** 19 * Array of date queries. 20 * 21 * See WP_Date_Query::__construct() for information on date query arguments. 22 * 23 * @since 3.7.0 24 * @var array 25 */ 26 public $queries = array(); 27 28 /** 29 * The default relation between top-level queries. Can be either 'AND' or 'OR'. 30 * 31 * @since 3.7.0 32 * @var string 33 */ 34 public $relation = 'AND'; 35 36 /** 37 * The column to query against. Can be changed via the query arguments. 38 * 39 * @since 3.7.0 40 * @var string 41 */ 42 public $column = 'post_date'; 43 44 /** 45 * The value comparison operator. Can be changed via the query arguments. 46 * 47 * @since 3.7.0 48 * @var array 49 */ 50 public $compare = '='; 51 52 /** 53 * Supported time-related parameter keys. 54 * 55 * @since 4.1.0 56 * @var array 57 */ 58 public $time_keys = array( 'after', 'before', 'year', 'month', 'monthnum', 'week', 'w', 'dayofyear', 'day', 'dayofweek', 'dayofweek_iso', 'hour', 'minute', 'second' ); 59 60 /** 61 * Constructor. 62 * 63 * Time-related parameters that normally require integer values ('year', 'month', 'week', 'dayofyear', 'day', 64 * 'dayofweek', 'dayofweek_iso', 'hour', 'minute', 'second') accept arrays of integers for some values of 65 * 'compare'. When 'compare' is 'IN' or 'NOT IN', arrays are accepted; when 'compare' is 'BETWEEN' or 'NOT 66 * BETWEEN', arrays of two valid values are required. See individual argument descriptions for accepted values. 67 * 68 * @since 3.7.0 69 * @since 4.0.0 The $inclusive logic was updated to include all times within the date range. 70 * @since 4.1.0 Introduced 'dayofweek_iso' time type parameter. 71 * 72 * @param array $date_query { 73 * Array of date query clauses. 74 * 75 * @type array { 76 * @type string $column Optional. The column to query against. If undefined, inherits the value of 77 * the `$default_column` parameter. Accepts 'post_date', 'post_date_gmt', 78 * 'post_modified','post_modified_gmt', 'comment_date', 'comment_date_gmt'. 79 * Default 'post_date'. 80 * @type string $compare Optional. The comparison operator. Accepts '=', '!=', '>', '>=', '<', '<=', 81 * 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN'. Default '='. 82 * @type string $relation Optional. The boolean relationship between the date queries. Accepts 'OR' or 'AND'. 83 * Default 'OR'. 84 * @type array { 85 * Optional. An array of first-order clause parameters, or another fully-formed date query. 86 * 87 * @type string|array $before { 88 * Optional. Date to retrieve posts before. Accepts `strtotime()`-compatible string, 89 * or array of 'year', 'month', 'day' values. 90 * 91 * @type string $year The four-digit year. Default empty. Accepts any four-digit year. 92 * @type string $month Optional when passing array.The month of the year. 93 * Default (string:empty)|(array:1). Accepts numbers 1-12. 94 * @type string $day Optional when passing array.The day of the month. 95 * Default (string:empty)|(array:1). Accepts numbers 1-31. 96 * } 97 * @type string|array $after { 98 * Optional. Date to retrieve posts after. Accepts `strtotime()`-compatible string, 99 * or array of 'year', 'month', 'day' values. 100 * 101 * @type string $year The four-digit year. Accepts any four-digit year. Default empty. 102 * @type string $month Optional when passing array. The month of the year. Accepts numbers 1-12. 103 * Default (string:empty)|(array:12). 104 * @type string $day Optional when passing array.The day of the month. Accepts numbers 1-31. 105 * Default (string:empty)|(array:last day of month). 106 * } 107 * @type string $column Optional. Used to add a clause comparing a column other than the 108 * column specified in the top-level `$column` parameter. Accepts 109 * 'post_date', 'post_date_gmt', 'post_modified', 'post_modified_gmt', 110 * 'comment_date', 'comment_date_gmt'. Default is the value of 111 * top-level `$column`. 112 * @type string $compare Optional. The comparison operator. Accepts '=', '!=', '>', '>=', 113 * '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN'. 'IN', 114 * 'NOT IN', 'BETWEEN', and 'NOT BETWEEN'. Comparisons support 115 * arrays in some time-related parameters. Default '='. 116 * @type bool $inclusive Optional. Include results from dates specified in 'before' or 117 * 'after'. Default false. 118 * @type int|array $year Optional. The four-digit year number. Accepts any four-digit year 119 * or an array of years if `$compare` supports it. Default empty. 120 * @type int|array $month Optional. The two-digit month number. Accepts numbers 1-12 or an 121 * array of valid numbers if `$compare` supports it. Default empty. 122 * @type int|array $week Optional. The week number of the year. Accepts numbers 0-53 or an 123 * array of valid numbers if `$compare` supports it. Default empty. 124 * @type int|array $dayofyear Optional. The day number of the year. Accepts numbers 1-366 or an 125 * array of valid numbers if `$compare` supports it. 126 * @type int|array $day Optional. The day of the month. Accepts numbers 1-31 or an array 127 * of valid numbers if `$compare` supports it. Default empty. 128 * @type int|array $dayofweek Optional. The day number of the week. Accepts numbers 1-7 (1 is 129 * Sunday) or an array of valid numbers if `$compare` supports it. 130 * Default empty. 131 * @type int|array $dayofweek_iso Optional. The day number of the week (ISO). Accepts numbers 1-7 132 * (1 is Monday) or an array of valid numbers if `$compare` supports it. 133 * Default empty. 134 * @type int|array $hour Optional. The hour of the day. Accepts numbers 0-23 or an array 135 * of valid numbers if `$compare` supports it. Default empty. 136 * @type int|array $minute Optional. The minute of the hour. Accepts numbers 0-60 or an array 137 * of valid numbers if `$compare` supports it. Default empty. 138 * @type int|array $second Optional. The second of the minute. Accepts numbers 0-60 or an 139 * array of valid numbers if `$compare` supports it. Default empty. 140 * } 141 * } 142 * } 143 * @param string $default_column Optional. Default column to query against. Default 'post_date'. 144 * Accepts 'post_date', 'post_date_gmt', 'post_modified', 'post_modified_gmt', 145 * 'comment_date', 'comment_date_gmt'. 146 */ 147 public function __construct( $date_query, $default_column = 'post_date' ) { 148 if ( empty( $date_query ) || ! is_array( $date_query ) ) { 149 return; 150 } 151 152 if ( isset( $date_query['relation'] ) && 'OR' === strtoupper( $date_query['relation'] ) ) { 153 $this->relation = 'OR'; 154 } else { 155 $this->relation = 'AND'; 156 } 157 158 // Support for passing time-based keys in the top level of the $date_query array. 159 if ( ! isset( $date_query[0] ) ) { 160 $date_query = array( $date_query ); 161 } 162 163 if ( ! empty( $date_query['column'] ) ) { 164 $date_query['column'] = esc_sql( $date_query['column'] ); 165 } else { 166 $date_query['column'] = esc_sql( $default_column ); 167 } 168 169 $this->column = $this->validate_column( $this->column ); 170 171 $this->compare = $this->get_compare( $date_query ); 172 173 $this->queries = $this->sanitize_query( $date_query ); 174 } 175 176 /** 177 * Recursive-friendly query sanitizer. 178 * 179 * Ensures that each query-level clause has a 'relation' key, and that 180 * each first-order clause contains all the necessary keys from 181 * `$defaults`. 182 * 183 * @since 4.1.0 184 * 185 * @param array $queries 186 * @param array $parent_query 187 * 188 * @return array Sanitized queries. 189 */ 190 public function sanitize_query( $queries, $parent_query = null ) { 191 $cleaned_query = array(); 192 193 $defaults = array( 194 'column' => 'post_date', 195 'compare' => '=', 196 'relation' => 'AND', 197 ); 198 199 // Numeric keys should always have array values. 200 foreach ( $queries as $qkey => $qvalue ) { 201 if ( is_numeric( $qkey ) && ! is_array( $qvalue ) ) { 202 unset( $queries[ $qkey ] ); 203 } 204 } 205 206 // Each query should have a value for each default key. Inherit from the parent when possible. 207 foreach ( $defaults as $dkey => $dvalue ) { 208 if ( isset( $queries[ $dkey ] ) ) { 209 continue; 210 } 211 212 if ( isset( $parent_query[ $dkey ] ) ) { 213 $queries[ $dkey ] = $parent_query[ $dkey ]; 214 } else { 215 $queries[ $dkey ] = $dvalue; 216 } 217 } 218 219 // Validate the dates passed in the query. 220 if ( $this->is_first_order_clause( $queries ) ) { 221 $this->validate_date_values( $queries ); 222 } 223 224 foreach ( $queries as $key => $q ) { 225 if ( ! is_array( $q ) || in_array( $key, $this->time_keys, true ) ) { 226 // This is a first-order query. Trust the values and sanitize when building SQL. 227 $cleaned_query[ $key ] = $q; 228 } else { 229 // Any array without a time key is another query, so we recurse. 230 $cleaned_query[] = $this->sanitize_query( $q, $queries ); 231 } 232 } 233 234 return $cleaned_query; 235 } 236 237 /** 238 * Determine whether this is a first-order clause. 239 * 240 * Checks to see if the current clause has any time-related keys. 241 * If so, it's first-order. 242 * 243 * @since 4.1.0 244 * 245 * @param array $query Query clause. 246 * @return bool True if this is a first-order clause. 247 */ 248 protected function is_first_order_clause( $query ) { 249 $time_keys = array_intersect( $this->time_keys, array_keys( $query ) ); 250 return ! empty( $time_keys ); 251 } 252 253 /** 254 * Determines and validates what comparison operator to use. 255 * 256 * @since 3.7.0 257 * 258 * @param array $query A date query or a date subquery. 259 * @return string The comparison operator. 260 */ 261 public function get_compare( $query ) { 262 if ( ! empty( $query['compare'] ) && in_array( $query['compare'], array( '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) { 263 return strtoupper( $query['compare'] ); 264 } 265 266 return $this->compare; 267 } 268 269 /** 270 * Validates the given date_query values and triggers errors if something is not valid. 271 * 272 * Note that date queries with invalid date ranges are allowed to 273 * continue (though of course no items will be found for impossible dates). 274 * This method only generates debug notices for these cases. 275 * 276 * @since 4.1.0 277 * 278 * @param array $date_query The date_query array. 279 * @return bool True if all values in the query are valid, false if one or more fail. 280 */ 281 public function validate_date_values( $date_query = array() ) { 282 if ( empty( $date_query ) ) { 283 return false; 284 } 285 286 $valid = true; 287 288 /* 289 * Validate 'before' and 'after' up front, then let the 290 * validation routine continue to be sure that all invalid 291 * values generate errors too. 292 */ 293 if ( array_key_exists( 'before', $date_query ) && is_array( $date_query['before'] ) ) { 294 $valid = $this->validate_date_values( $date_query['before'] ); 295 } 296 297 if ( array_key_exists( 'after', $date_query ) && is_array( $date_query['after'] ) ) { 298 $valid = $this->validate_date_values( $date_query['after'] ); 299 } 300 301 // Array containing all min-max checks. 302 $min_max_checks = array(); 303 304 // Days per year. 305 if ( array_key_exists( 'year', $date_query ) ) { 306 /* 307 * If a year exists in the date query, we can use it to get the days. 308 * If multiple years are provided (as in a BETWEEN), use the first one. 309 */ 310 if ( is_array( $date_query['year'] ) ) { 311 $_year = reset( $date_query['year'] ); 312 } else { 313 $_year = $date_query['year']; 314 } 315 316 $max_days_of_year = gmdate( 'z', mktime( 0, 0, 0, 12, 31, $_year ) ) + 1; 317 } else { 318 // otherwise we use the max of 366 (leap-year) 319 $max_days_of_year = 366; 320 } 321 322 $min_max_checks['dayofyear'] = array( 323 'min' => 1, 324 'max' => $max_days_of_year, 325 ); 326 327 // Days per week. 328 $min_max_checks['dayofweek'] = array( 329 'min' => 1, 330 'max' => 7, 331 ); 332 333 // Days per week. 334 $min_max_checks['dayofweek_iso'] = array( 335 'min' => 1, 336 'max' => 7, 337 ); 338 339 // Months per year. 340 $min_max_checks['month'] = array( 341 'min' => 1, 342 'max' => 12, 343 ); 344 345 // Weeks per year. 346 if ( isset( $_year ) ) { 347 /* 348 * If we have a specific year, use it to calculate number of weeks. 349 * Note: the number of weeks in a year is the date in which Dec 28 appears. 350 */ 351 $week_count = gmdate( 'W', mktime( 0, 0, 0, 12, 28, $_year ) ); 352 353 } else { 354 // Otherwise set the week-count to a maximum of 53. 355 $week_count = 53; 356 } 357 358 $min_max_checks['week'] = array( 359 'min' => 1, 360 'max' => $week_count, 361 ); 362 363 // Days per month. 364 $min_max_checks['day'] = array( 365 'min' => 1, 366 'max' => 31, 367 ); 368 369 // Hours per day. 370 $min_max_checks['hour'] = array( 371 'min' => 0, 372 'max' => 23, 373 ); 374 375 // Minutes per hour. 376 $min_max_checks['minute'] = array( 377 'min' => 0, 378 'max' => 59, 379 ); 380 381 // Seconds per minute. 382 $min_max_checks['second'] = array( 383 'min' => 0, 384 'max' => 59, 385 ); 386 387 // Concatenate and throw a notice for each invalid value. 388 foreach ( $min_max_checks as $key => $check ) { 389 if ( ! array_key_exists( $key, $date_query ) ) { 390 continue; 391 } 392 393 // Throw a notice for each failing value. 394 foreach ( (array) $date_query[ $key ] as $_value ) { 395 $is_between = $_value >= $check['min'] && $_value <= $check['max']; 396 397 if ( ! is_numeric( $_value ) || ! $is_between ) { 398 $error = sprintf( 399 /* translators: Date query invalid date message. 1: Invalid value, 2: Type of value, 3: Minimum valid value, 4: Maximum valid value. */ 400 __( 'Invalid value %1$s for %2$s. Expected value should be between %3$s and %4$s.' ), 401 '<code>' . esc_html( $_value ) . '</code>', 402 '<code>' . esc_html( $key ) . '</code>', 403 '<code>' . esc_html( $check['min'] ) . '</code>', 404 '<code>' . esc_html( $check['max'] ) . '</code>' 405 ); 406 407 _doing_it_wrong( __CLASS__, $error, '4.1.0' ); 408 409 $valid = false; 410 } 411 } 412 } 413 414 // If we already have invalid date messages, don't bother running through checkdate(). 415 if ( ! $valid ) { 416 return $valid; 417 } 418 419 $day_month_year_error_msg = ''; 420 421 $day_exists = array_key_exists( 'day', $date_query ) && is_numeric( $date_query['day'] ); 422 $month_exists = array_key_exists( 'month', $date_query ) && is_numeric( $date_query['month'] ); 423 $year_exists = array_key_exists( 'year', $date_query ) && is_numeric( $date_query['year'] ); 424 425 if ( $day_exists && $month_exists && $year_exists ) { 426 // 1. Checking day, month, year combination. 427 if ( ! wp_checkdate( $date_query['month'], $date_query['day'], $date_query['year'], sprintf( '%s-%s-%s', $date_query['year'], $date_query['month'], $date_query['day'] ) ) ) { 428 $day_month_year_error_msg = sprintf( 429 /* translators: 1: Year, 2: Month, 3: Day of month. */ 430 __( 'The following values do not describe a valid date: year %1$s, month %2$s, day %3$s.' ), 431 '<code>' . esc_html( $date_query['year'] ) . '</code>', 432 '<code>' . esc_html( $date_query['month'] ) . '</code>', 433 '<code>' . esc_html( $date_query['day'] ) . '</code>' 434 ); 435 436 $valid = false; 437 } 438 } elseif ( $day_exists && $month_exists ) { 439 /* 440 * 2. checking day, month combination 441 * We use 2012 because, as a leap year, it's the most permissive. 442 */ 443 if ( ! wp_checkdate( $date_query['month'], $date_query['day'], 2012, sprintf( '2012-%s-%s', $date_query['month'], $date_query['day'] ) ) ) { 444 $day_month_year_error_msg = sprintf( 445 /* translators: 1: Month, 2: Day of month. */ 446 __( 'The following values do not describe a valid date: month %1$s, day %2$s.' ), 447 '<code>' . esc_html( $date_query['month'] ) . '</code>', 448 '<code>' . esc_html( $date_query['day'] ) . '</code>' 449 ); 450 451 $valid = false; 452 } 453 } 454 455 if ( ! empty( $day_month_year_error_msg ) ) { 456 _doing_it_wrong( __CLASS__, $day_month_year_error_msg, '4.1.0' ); 457 } 458 459 return $valid; 460 } 461 462 /** 463 * Validates a column name parameter. 464 * 465 * Column names without a table prefix (like 'post_date') are checked against a whitelist of 466 * known tables, and then, if found, have a table prefix (such as 'wp_posts.') prepended. 467 * Prefixed column names (such as 'wp_posts.post_date') bypass this whitelist check, 468 * and are only sanitized to remove illegal characters. 469 * 470 * @since 3.7.0 471 * 472 * @param string $column The user-supplied column name. 473 * @return string A validated column name value. 474 */ 475 public function validate_column( $column ) { 476 global $wpdb; 477 478 $valid_columns = array( 479 'post_date', 480 'post_date_gmt', 481 'post_modified', 482 'post_modified_gmt', 483 'comment_date', 484 'comment_date_gmt', 485 'user_registered', 486 'registered', 487 'last_updated', 488 ); 489 490 // Attempt to detect a table prefix. 491 if ( false === strpos( $column, '.' ) ) { 492 /** 493 * Filters the list of valid date query columns. 494 * 495 * @since 3.7.0 496 * @since 4.1.0 Added 'user_registered' to the default recognized columns. 497 * 498 * @param string[] $valid_columns An array of valid date query columns. Defaults 499 * are 'post_date', 'post_date_gmt', 'post_modified', 500 * 'post_modified_gmt', 'comment_date', 'comment_date_gmt', 501 * 'user_registered' 502 */ 503 if ( ! in_array( $column, apply_filters( 'date_query_valid_columns', $valid_columns ) ) ) { 504 $column = 'post_date'; 505 } 506 507 $known_columns = array( 508 $wpdb->posts => array( 509 'post_date', 510 'post_date_gmt', 511 'post_modified', 512 'post_modified_gmt', 513 ), 514 $wpdb->comments => array( 515 'comment_date', 516 'comment_date_gmt', 517 ), 518 $wpdb->users => array( 519 'user_registered', 520 ), 521 $wpdb->blogs => array( 522 'registered', 523 'last_updated', 524 ), 525 ); 526 527 // If it's a known column name, add the appropriate table prefix. 528 foreach ( $known_columns as $table_name => $table_columns ) { 529 if ( in_array( $column, $table_columns ) ) { 530 $column = $table_name . '.' . $column; 531 break; 532 } 533 } 534 } 535 536 // Remove unsafe characters. 537 return preg_replace( '/[^a-zA-Z0-9_$\.]/', '', $column ); 538 } 539 540 /** 541 * Generate WHERE clause to be appended to a main query. 542 * 543 * @since 3.7.0 544 * 545 * @return string MySQL WHERE clause. 546 */ 547 public function get_sql() { 548 $sql = $this->get_sql_clauses(); 549 550 $where = $sql['where']; 551 552 /** 553 * Filters the date query WHERE clause. 554 * 555 * @since 3.7.0 556 * 557 * @param string $where WHERE clause of the date query. 558 * @param WP_Date_Query $this The WP_Date_Query instance. 559 */ 560 return apply_filters( 'get_date_sql', $where, $this ); 561 } 562 563 /** 564 * Generate SQL clauses to be appended to a main query. 565 * 566 * Called by the public WP_Date_Query::get_sql(), this method is abstracted 567 * out to maintain parity with the other Query classes. 568 * 569 * @since 4.1.0 570 * 571 * @return array { 572 * Array containing JOIN and WHERE SQL clauses to append to the main query. 573 * 574 * @type string $join SQL fragment to append to the main JOIN clause. 575 * @type string $where SQL fragment to append to the main WHERE clause. 576 * } 577 */ 578 protected function get_sql_clauses() { 579 $sql = $this->get_sql_for_query( $this->queries ); 580 581 if ( ! empty( $sql['where'] ) ) { 582 $sql['where'] = ' AND ' . $sql['where']; 583 } 584 585 return $sql; 586 } 587 588 /** 589 * Generate SQL clauses for a single query array. 590 * 591 * If nested subqueries are found, this method recurses the tree to 592 * produce the properly nested SQL. 593 * 594 * @since 4.1.0 595 * 596 * @param array $query Query to parse. 597 * @param int $depth Optional. Number of tree levels deep we currently are. 598 * Used to calculate indentation. Default 0. 599 * @return array { 600 * Array containing JOIN and WHERE SQL clauses to append to a single query array. 601 * 602 * @type string $join SQL fragment to append to the main JOIN clause. 603 * @type string $where SQL fragment to append to the main WHERE clause. 604 * } 605 */ 606 protected function get_sql_for_query( $query, $depth = 0 ) { 607 $sql_chunks = array( 608 'join' => array(), 609 'where' => array(), 610 ); 611 612 $sql = array( 613 'join' => '', 614 'where' => '', 615 ); 616 617 $indent = ''; 618 for ( $i = 0; $i < $depth; $i++ ) { 619 $indent .= ' '; 620 } 621 622 foreach ( $query as $key => $clause ) { 623 if ( 'relation' === $key ) { 624 $relation = $query['relation']; 625 } elseif ( is_array( $clause ) ) { 626 627 // This is a first-order clause. 628 if ( $this->is_first_order_clause( $clause ) ) { 629 $clause_sql = $this->get_sql_for_clause( $clause, $query ); 630 631 $where_count = count( $clause_sql['where'] ); 632 if ( ! $where_count ) { 633 $sql_chunks['where'][] = ''; 634 } elseif ( 1 === $where_count ) { 635 $sql_chunks['where'][] = $clause_sql['where'][0]; 636 } else { 637 $sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )'; 638 } 639 640 $sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] ); 641 // This is a subquery, so we recurse. 642 } else { 643 $clause_sql = $this->get_sql_for_query( $clause, $depth + 1 ); 644 645 $sql_chunks['where'][] = $clause_sql['where']; 646 $sql_chunks['join'][] = $clause_sql['join']; 647 } 648 } 649 } 650 651 // Filter to remove empties. 652 $sql_chunks['join'] = array_filter( $sql_chunks['join'] ); 653 $sql_chunks['where'] = array_filter( $sql_chunks['where'] ); 654 655 if ( empty( $relation ) ) { 656 $relation = 'AND'; 657 } 658 659 // Filter duplicate JOIN clauses and combine into a single string. 660 if ( ! empty( $sql_chunks['join'] ) ) { 661 $sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) ); 662 } 663 664 // Generate a single WHERE clause with proper brackets and indentation. 665 if ( ! empty( $sql_chunks['where'] ) ) { 666 $sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')'; 667 } 668 669 return $sql; 670 } 671 672 /** 673 * Turns a single date clause into pieces for a WHERE clause. 674 * 675 * A wrapper for get_sql_for_clause(), included here for backward 676 * compatibility while retaining the naming convention across Query classes. 677 * 678 * @since 3.7.0 679 * 680 * @param array $query Date query arguments. 681 * @return array { 682 * Array containing JOIN and WHERE SQL clauses to append to the main query. 683 * 684 * @type string $join SQL fragment to append to the main JOIN clause. 685 * @type string $where SQL fragment to append to the main WHERE clause. 686 * } 687 */ 688 protected function get_sql_for_subquery( $query ) { 689 return $this->get_sql_for_clause( $query, '' ); 690 } 691 692 /** 693 * Turns a first-order date query into SQL for a WHERE clause. 694 * 695 * @since 4.1.0 696 * 697 * @param array $query Date query clause. 698 * @param array $parent_query Parent query of the current date query. 699 * @return array { 700 * Array containing JOIN and WHERE SQL clauses to append to the main query. 701 * 702 * @type string $join SQL fragment to append to the main JOIN clause. 703 * @type string $where SQL fragment to append to the main WHERE clause. 704 * } 705 */ 706 protected function get_sql_for_clause( $query, $parent_query ) { 707 global $wpdb; 708 709 // The sub-parts of a $where part. 710 $where_parts = array(); 711 712 $column = ( ! empty( $query['column'] ) ) ? esc_sql( $query['column'] ) : $this->column; 713 714 $column = $this->validate_column( $column ); 715 716 $compare = $this->get_compare( $query ); 717 718 $inclusive = ! empty( $query['inclusive'] ); 719 720 // Assign greater- and less-than values. 721 $lt = '<'; 722 $gt = '>'; 723 724 if ( $inclusive ) { 725 $lt .= '='; 726 $gt .= '='; 727 } 728 729 // Range queries. 730 if ( ! empty( $query['after'] ) ) { 731 $where_parts[] = $wpdb->prepare( "$column $gt %s", $this->build_mysql_datetime( $query['after'], ! $inclusive ) ); 732 } 733 if ( ! empty( $query['before'] ) ) { 734 $where_parts[] = $wpdb->prepare( "$column $lt %s", $this->build_mysql_datetime( $query['before'], $inclusive ) ); 735 } 736 // Specific value queries. 737 738 $date_units = array( 739 'YEAR' => array( 'year' ), 740 'MONTH' => array( 'month', 'monthnum' ), 741 '_wp_mysql_week' => array( 'week', 'w' ), 742 'DAYOFYEAR' => array( 'dayofyear' ), 743 'DAYOFMONTH' => array( 'day' ), 744 'DAYOFWEEK' => array( 'dayofweek' ), 745 'WEEKDAY' => array( 'dayofweek_iso' ), 746 ); 747 748 // Check of the possible date units and add them to the query 749 foreach ( $date_units as $sql_part => $query_parts ) { 750 foreach ( $query_parts as $query_part ) { 751 if ( isset( $query[ $query_part ] ) ) { 752 $value = $this->build_value( $compare, $query[ $query_part ] ); 753 if ( $value ) { 754 switch ( $sql_part ) { 755 case '_wp_mysql_week': 756 $where_parts[] = _wp_mysql_week( $column ) . " $compare $value"; 757 break; 758 case 'WEEKDAY': 759 $where_parts[] = "$sql_part( $column ) + 1 $compare $value"; 760 break; 761 default: 762 $where_parts[] = "$sql_part( $column ) $compare $value"; 763 } 764 765 break; 766 } 767 } 768 } 769 } 770 771 if ( isset( $query['hour'] ) || isset( $query['minute'] ) || isset( $query['second'] ) ) { 772 // Avoid notices. 773 foreach ( array( 'hour', 'minute', 'second' ) as $unit ) { 774 if ( ! isset( $query[ $unit ] ) ) { 775 $query[ $unit ] = null; 776 } 777 } 778 779 $time_query = $this->build_time_query( $column, $compare, $query['hour'], $query['minute'], $query['second'] ); 780 if ( $time_query ) { 781 $where_parts[] = $time_query; 782 } 783 } 784 785 /* 786 * Return an array of 'join' and 'where' for compatibility 787 * with other query classes. 788 */ 789 return array( 790 'where' => $where_parts, 791 'join' => array(), 792 ); 793 } 794 795 /** 796 * Builds and validates a value string based on the comparison operator. 797 * 798 * @since 3.7.0 799 * 800 * @param string $compare The compare operator to use 801 * @param string|array $value The value 802 * @return string|false|int The value to be used in SQL or false on error. 803 */ 804 public function build_value( $compare, $value ) { 805 if ( ! isset( $value ) ) { 806 return false; 807 } 808 809 switch ( $compare ) { 810 case 'IN': 811 case 'NOT IN': 812 $value = (array) $value; 813 814 // Remove non-numeric values. 815 $value = array_filter( $value, 'is_numeric' ); 816 817 if ( empty( $value ) ) { 818 return false; 819 } 820 821 return '(' . implode( ',', array_map( 'intval', $value ) ) . ')'; 822 823 case 'BETWEEN': 824 case 'NOT BETWEEN': 825 if ( ! is_array( $value ) || 2 != count( $value ) ) { 826 $value = array( $value, $value ); 827 } else { 828 $value = array_values( $value ); 829 } 830 831 // If either value is non-numeric, bail. 832 foreach ( $value as $v ) { 833 if ( ! is_numeric( $v ) ) { 834 return false; 835 } 836 } 837 838 $value = array_map( 'intval', $value ); 839 840 return $value[0] . ' AND ' . $value[1]; 841 842 default: 843 if ( ! is_numeric( $value ) ) { 844 return false; 845 } 846 847 return (int) $value; 848 } 849 } 850 851 /** 852 * Builds a MySQL format date/time based on some query parameters. 853 * 854 * You can pass an array of values (year, month, etc.) with missing parameter values being defaulted to 855 * either the maximum or minimum values (controlled by the $default_to parameter). Alternatively you can 856 * pass a string that will be passed to date_create(). 857 * 858 * @since 3.7.0 859 * 860 * @param string|array $datetime An array of parameters or a strotime() string 861 * @param bool $default_to_max Whether to round up incomplete dates. Supported by values 862 * of $datetime that are arrays, or string values that are a 863 * subset of MySQL date format ('Y', 'Y-m', 'Y-m-d', 'Y-m-d H:i'). 864 * Default: false. 865 * @return string|false A MySQL format date/time or false on failure 866 */ 867 public function build_mysql_datetime( $datetime, $default_to_max = false ) { 868 if ( ! is_array( $datetime ) ) { 869 870 /* 871 * Try to parse some common date formats, so we can detect 872 * the level of precision and support the 'inclusive' parameter. 873 */ 874 if ( preg_match( '/^(\d{4})$/', $datetime, $matches ) ) { 875 // Y 876 $datetime = array( 877 'year' => intval( $matches[1] ), 878 ); 879 880 } elseif ( preg_match( '/^(\d{4})\-(\d{2})$/', $datetime, $matches ) ) { 881 // Y-m 882 $datetime = array( 883 'year' => intval( $matches[1] ), 884 'month' => intval( $matches[2] ), 885 ); 886 887 } elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2})$/', $datetime, $matches ) ) { 888 // Y-m-d 889 $datetime = array( 890 'year' => intval( $matches[1] ), 891 'month' => intval( $matches[2] ), 892 'day' => intval( $matches[3] ), 893 ); 894 895 } elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2}) (\d{2}):(\d{2})$/', $datetime, $matches ) ) { 896 // Y-m-d H:i 897 $datetime = array( 898 'year' => intval( $matches[1] ), 899 'month' => intval( $matches[2] ), 900 'day' => intval( $matches[3] ), 901 'hour' => intval( $matches[4] ), 902 'minute' => intval( $matches[5] ), 903 ); 904 } 905 906 // If no match is found, we don't support default_to_max. 907 if ( ! is_array( $datetime ) ) { 908 $wp_timezone = wp_timezone(); 909 910 // Assume local timezone if not provided. 911 $dt = date_create( $datetime, $wp_timezone ); 912 913 if ( false === $dt ) { 914 return gmdate( 'Y-m-d H:i:s', false ); 915 } 916 917 return $dt->setTimezone( $wp_timezone )->format( 'Y-m-d H:i:s' ); 918 } 919 } 920 921 $datetime = array_map( 'absint', $datetime ); 922 923 if ( ! isset( $datetime['year'] ) ) { 924 $datetime['year'] = current_time( 'Y' ); 925 } 926 927 if ( ! isset( $datetime['month'] ) ) { 928 $datetime['month'] = ( $default_to_max ) ? 12 : 1; 929 } 930 931 if ( ! isset( $datetime['day'] ) ) { 932 $datetime['day'] = ( $default_to_max ) ? (int) gmdate( 't', mktime( 0, 0, 0, $datetime['month'], 1, $datetime['year'] ) ) : 1; 933 } 934 935 if ( ! isset( $datetime['hour'] ) ) { 936 $datetime['hour'] = ( $default_to_max ) ? 23 : 0; 937 } 938 939 if ( ! isset( $datetime['minute'] ) ) { 940 $datetime['minute'] = ( $default_to_max ) ? 59 : 0; 941 } 942 943 if ( ! isset( $datetime['second'] ) ) { 944 $datetime['second'] = ( $default_to_max ) ? 59 : 0; 945 } 946 947 return sprintf( '%04d-%02d-%02d %02d:%02d:%02d', $datetime['year'], $datetime['month'], $datetime['day'], $datetime['hour'], $datetime['minute'], $datetime['second'] ); 948 } 949 950 /** 951 * Builds a query string for comparing time values (hour, minute, second). 952 * 953 * If just hour, minute, or second is set than a normal comparison will be done. 954 * However if multiple values are passed, a pseudo-decimal time will be created 955 * in order to be able to accurately compare against. 956 * 957 * @since 3.7.0 958 * 959 * @param string $column The column to query against. Needs to be pre-validated! 960 * @param string $compare The comparison operator. Needs to be pre-validated! 961 * @param int|null $hour Optional. An hour value (0-23). 962 * @param int|null $minute Optional. A minute value (0-59). 963 * @param int|null $second Optional. A second value (0-59). 964 * @return string|false A query part or false on failure. 965 */ 966 public function build_time_query( $column, $compare, $hour = null, $minute = null, $second = null ) { 967 global $wpdb; 968 969 // Have to have at least one 970 if ( ! isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) { 971 return false; 972 } 973 974 // Complex combined queries aren't supported for multi-value queries 975 if ( in_array( $compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) { 976 $return = array(); 977 978 $value = $this->build_value( $compare, $hour ); 979 if ( false !== $value ) { 980 $return[] = "HOUR( $column ) $compare $value"; 981 } 982 983 $value = $this->build_value( $compare, $minute ); 984 if ( false !== $value ) { 985 $return[] = "MINUTE( $column ) $compare $value"; 986 } 987 988 $value = $this->build_value( $compare, $second ); 989 if ( false !== $value ) { 990 $return[] = "SECOND( $column ) $compare $value"; 991 } 992 993 return implode( ' AND ', $return ); 994 } 995 996 // Cases where just one unit is set 997 if ( isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) { 998 $value = $this->build_value( $compare, $hour ); 999 if ( false !== $value ) { 1000 return "HOUR( $column ) $compare $value"; 1001 } 1002 } elseif ( ! isset( $hour ) && isset( $minute ) && ! isset( $second ) ) { 1003 $value = $this->build_value( $compare, $minute ); 1004 if ( false !== $value ) { 1005 return "MINUTE( $column ) $compare $value"; 1006 } 1007 } elseif ( ! isset( $hour ) && ! isset( $minute ) && isset( $second ) ) { 1008 $value = $this->build_value( $compare, $second ); 1009 if ( false !== $value ) { 1010 return "SECOND( $column ) $compare $value"; 1011 } 1012 } 1013 1014 // Single units were already handled. Since hour & second isn't allowed, minute must to be set. 1015 if ( ! isset( $minute ) ) { 1016 return false; 1017 } 1018 1019 $format = ''; 1020 $time = ''; 1021 1022 // Hour 1023 if ( null !== $hour ) { 1024 $format .= '%H.'; 1025 $time .= sprintf( '%02d', $hour ) . '.'; 1026 } else { 1027 $format .= '0.'; 1028 $time .= '0.'; 1029 } 1030 1031 // Minute 1032 $format .= '%i'; 1033 $time .= sprintf( '%02d', $minute ); 1034 1035 if ( isset( $second ) ) { 1036 $format .= '%s'; 1037 $time .= sprintf( '%02d', $second ); 1038 } 1039 1040 return $wpdb->prepare( "DATE_FORMAT( $column, %s ) $compare %f", $format, $time ); 1041 } 1042 }
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