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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 string 49 */ 50 public $compare = '='; 51 52 /** 53 * Supported time-related parameter keys. 54 * 55 * @since 4.1.0 56 * @var string[] 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 ...$0 { 76 * @type string $column Optional. The column to query against. If undefined, inherits the value of 77 * the `$default_column` parameter. See WP_Date_Query::validate_column() and 78 * the {@see 'date_query_valid_columns'} filter for the list of accepted values. 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 ...$0 { 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 $column Optional. Used to add a clause comparing a column other than 108 * the column specified in the top-level `$column` parameter. 109 * See WP_Date_Query::validate_column() and 110 * the {@see 'date_query_valid_columns'} filter for the list 111 * of accepted values. Default is the value of 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|int[] $year Optional. The four-digit year number. Accepts any four-digit year 119 * or an array of years if `$compare` supports it. Default empty. 120 * @type int|int[] $month Optional. The two-digit month number. Accepts numbers 1-12 or an 121 * array of valid numbers if `$compare` supports it. Default empty. 122 * @type int|int[] $week Optional. The week number of the year. Accepts numbers 0-53 or an 123 * array of valid numbers if `$compare` supports it. Default empty. 124 * @type int|int[] $dayofyear Optional. The day number of the year. Accepts numbers 1-366 or an 125 * array of valid numbers if `$compare` supports it. 126 * @type int|int[] $day Optional. The day of the month. Accepts numbers 1-31 or an array 127 * of valid numbers if `$compare` supports it. Default empty. 128 * @type int|int[] $dayofweek Optional. The day number of the week. Accepts numbers 1-7 (1 is 129 * Sunday) or an array of valid numbers if `$compare` supports it. 130 * Default empty. 131 * @type int|int[] $dayofweek_iso Optional. The day number of the week (ISO). Accepts numbers 1-7 132 * (1 is Monday) or an array of valid numbers if `$compare` supports it. 133 * Default empty. 134 * @type int|int[] $hour Optional. The hour of the day. Accepts numbers 0-23 or an array 135 * of valid numbers if `$compare` supports it. Default empty. 136 * @type int|int[] $minute Optional. The minute of the hour. Accepts numbers 0-59 or an array 137 * of valid numbers if `$compare` supports it. Default empty. 138 * @type int|int[] $second Optional. The second of the minute. Accepts numbers 0-59 or an 139 * array of valid numbers if `$compare` supports it. Default empty. 140 * } 141 * } 142 * } 143 * @param string $default_column Optional. Default column to query against. See WP_Date_Query::validate_column() 144 * and the {@see 'date_query_valid_columns'} filter for the list of accepted values. 145 * Default 'post_date'. 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( $date_query ); 174 } 175 176 /** 177 * Recursive-friendly query sanitizer. 178 * 179 * Ensures that each query-level clause has a 'relation' key, and that 180 * each first-order clause contains all the necessary keys from `$defaults`. 181 * 182 * @since 4.1.0 183 * 184 * @param array $queries 185 * @param array $parent_query 186 * @return array Sanitized queries. 187 */ 188 public function sanitize_query( $queries, $parent_query = null ) { 189 $cleaned_query = array(); 190 191 $defaults = array( 192 'column' => 'post_date', 193 'compare' => '=', 194 'relation' => 'AND', 195 ); 196 197 // Numeric keys should always have array values. 198 foreach ( $queries as $qkey => $qvalue ) { 199 if ( is_numeric( $qkey ) && ! is_array( $qvalue ) ) { 200 unset( $queries[ $qkey ] ); 201 } 202 } 203 204 // Each query should have a value for each default key. Inherit from the parent when possible. 205 foreach ( $defaults as $dkey => $dvalue ) { 206 if ( isset( $queries[ $dkey ] ) ) { 207 continue; 208 } 209 210 if ( isset( $parent_query[ $dkey ] ) ) { 211 $queries[ $dkey ] = $parent_query[ $dkey ]; 212 } else { 213 $queries[ $dkey ] = $dvalue; 214 } 215 } 216 217 // Validate the dates passed in the query. 218 if ( $this->is_first_order_clause( $queries ) ) { 219 $this->validate_date_values( $queries ); 220 } 221 222 foreach ( $queries as $key => $q ) { 223 if ( ! is_array( $q ) || in_array( $key, $this->time_keys, true ) ) { 224 // This is a first-order query. Trust the values and sanitize when building SQL. 225 $cleaned_query[ $key ] = $q; 226 } else { 227 // Any array without a time key is another query, so we recurse. 228 $cleaned_query[] = $this->sanitize_query( $q, $queries ); 229 } 230 } 231 232 return $cleaned_query; 233 } 234 235 /** 236 * Determine whether this is a first-order clause. 237 * 238 * Checks to see if the current clause has any time-related keys. 239 * If so, it's first-order. 240 * 241 * @since 4.1.0 242 * 243 * @param array $query Query clause. 244 * @return bool True if this is a first-order clause. 245 */ 246 protected function is_first_order_clause( $query ) { 247 $time_keys = array_intersect( $this->time_keys, array_keys( $query ) ); 248 return ! empty( $time_keys ); 249 } 250 251 /** 252 * Determines and validates what comparison operator to use. 253 * 254 * @since 3.7.0 255 * 256 * @param array $query A date query or a date subquery. 257 * @return string The comparison operator. 258 */ 259 public function get_compare( $query ) { 260 if ( ! empty( $query['compare'] ) 261 && in_array( $query['compare'], array( '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true ) 262 ) { 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 list of 466 * allowed and known tables, and then, if found, have a table prefix (such as 'wp_posts.') 467 * prepended. Prefixed column names (such as 'wp_posts.post_date') bypass this allowed 468 * check, 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 * @since 4.6.0 Added 'registered' and 'last_updated' to the default recognized columns. 498 * 499 * @param string[] $valid_columns An array of valid date query columns. Defaults 500 * are 'post_date', 'post_date_gmt', 'post_modified', 501 * 'post_modified_gmt', 'comment_date', 'comment_date_gmt', 502 * 'user_registered', 'registered', 'last_updated'. 503 */ 504 if ( ! in_array( $column, apply_filters( 'date_query_valid_columns', $valid_columns ), true ) ) { 505 $column = 'post_date'; 506 } 507 508 $known_columns = array( 509 $wpdb->posts => array( 510 'post_date', 511 'post_date_gmt', 512 'post_modified', 513 'post_modified_gmt', 514 ), 515 $wpdb->comments => array( 516 'comment_date', 517 'comment_date_gmt', 518 ), 519 $wpdb->users => array( 520 'user_registered', 521 ), 522 $wpdb->blogs => array( 523 'registered', 524 'last_updated', 525 ), 526 ); 527 528 // If it's a known column name, add the appropriate table prefix. 529 foreach ( $known_columns as $table_name => $table_columns ) { 530 if ( in_array( $column, $table_columns, true ) ) { 531 $column = $table_name . '.' . $column; 532 break; 533 } 534 } 535 } 536 537 // Remove unsafe characters. 538 return preg_replace( '/[^a-zA-Z0-9_$\.]/', '', $column ); 539 } 540 541 /** 542 * Generate WHERE clause to be appended to a main query. 543 * 544 * @since 3.7.0 545 * 546 * @return string MySQL WHERE clause. 547 */ 548 public function get_sql() { 549 $sql = $this->get_sql_clauses(); 550 551 $where = $sql['where']; 552 553 /** 554 * Filters the date query WHERE clause. 555 * 556 * @since 3.7.0 557 * 558 * @param string $where WHERE clause of the date query. 559 * @param WP_Date_Query $query The WP_Date_Query instance. 560 */ 561 return apply_filters( 'get_date_sql', $where, $this ); 562 } 563 564 /** 565 * Generate SQL clauses to be appended to a main query. 566 * 567 * Called by the public WP_Date_Query::get_sql(), this method is abstracted 568 * out to maintain parity with the other Query classes. 569 * 570 * @since 4.1.0 571 * 572 * @return string[] { 573 * Array containing JOIN and WHERE SQL clauses to append to the main query. 574 * 575 * @type string $join SQL fragment to append to the main JOIN clause. 576 * @type string $where SQL fragment to append to the main WHERE clause. 577 * } 578 */ 579 protected function get_sql_clauses() { 580 $sql = $this->get_sql_for_query( $this->queries ); 581 582 if ( ! empty( $sql['where'] ) ) { 583 $sql['where'] = ' AND ' . $sql['where']; 584 } 585 586 return $sql; 587 } 588 589 /** 590 * Generate SQL clauses for a single query array. 591 * 592 * If nested subqueries are found, this method recurses the tree to 593 * produce the properly nested SQL. 594 * 595 * @since 4.1.0 596 * 597 * @param array $query Query to parse. 598 * @param int $depth Optional. Number of tree levels deep we currently are. 599 * Used to calculate indentation. Default 0. 600 * @return array { 601 * Array containing JOIN and WHERE SQL clauses to append to a single query array. 602 * 603 * @type string $join SQL fragment to append to the main JOIN clause. 604 * @type string $where SQL fragment to append to the main WHERE clause. 605 * } 606 */ 607 protected function get_sql_for_query( $query, $depth = 0 ) { 608 $sql_chunks = array( 609 'join' => array(), 610 'where' => array(), 611 ); 612 613 $sql = array( 614 'join' => '', 615 'where' => '', 616 ); 617 618 $indent = ''; 619 for ( $i = 0; $i < $depth; $i++ ) { 620 $indent .= ' '; 621 } 622 623 foreach ( $query as $key => $clause ) { 624 if ( 'relation' === $key ) { 625 $relation = $query['relation']; 626 } elseif ( is_array( $clause ) ) { 627 628 // This is a first-order clause. 629 if ( $this->is_first_order_clause( $clause ) ) { 630 $clause_sql = $this->get_sql_for_clause( $clause, $query ); 631 632 $where_count = count( $clause_sql['where'] ); 633 if ( ! $where_count ) { 634 $sql_chunks['where'][] = ''; 635 } elseif ( 1 === $where_count ) { 636 $sql_chunks['where'][] = $clause_sql['where'][0]; 637 } else { 638 $sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )'; 639 } 640 641 $sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] ); 642 // This is a subquery, so we recurse. 643 } else { 644 $clause_sql = $this->get_sql_for_query( $clause, $depth + 1 ); 645 646 $sql_chunks['where'][] = $clause_sql['where']; 647 $sql_chunks['join'][] = $clause_sql['join']; 648 } 649 } 650 } 651 652 // Filter to remove empties. 653 $sql_chunks['join'] = array_filter( $sql_chunks['join'] ); 654 $sql_chunks['where'] = array_filter( $sql_chunks['where'] ); 655 656 if ( empty( $relation ) ) { 657 $relation = 'AND'; 658 } 659 660 // Filter duplicate JOIN clauses and combine into a single string. 661 if ( ! empty( $sql_chunks['join'] ) ) { 662 $sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) ); 663 } 664 665 // Generate a single WHERE clause with proper brackets and indentation. 666 if ( ! empty( $sql_chunks['where'] ) ) { 667 $sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')'; 668 } 669 670 return $sql; 671 } 672 673 /** 674 * Turns a single date clause into pieces for a WHERE clause. 675 * 676 * A wrapper for get_sql_for_clause(), included here for backward 677 * compatibility while retaining the naming convention across Query classes. 678 * 679 * @since 3.7.0 680 * 681 * @param array $query Date query arguments. 682 * @return string[] { 683 * Array containing JOIN and WHERE SQL clauses to append to the main query. 684 * 685 * @type string $join SQL fragment to append to the main JOIN clause. 686 * @type string $where SQL fragment to append to the main WHERE clause. 687 * } 688 */ 689 protected function get_sql_for_subquery( $query ) { 690 return $this->get_sql_for_clause( $query, '' ); 691 } 692 693 /** 694 * Turns a first-order date query into SQL for a WHERE clause. 695 * 696 * @since 4.1.0 697 * 698 * @param array $query Date query clause. 699 * @param array $parent_query Parent query of the current date query. 700 * @return string[] { 701 * Array containing JOIN and WHERE SQL clauses to append to the main query. 702 * 703 * @type string $join SQL fragment to append to the main JOIN clause. 704 * @type string $where SQL fragment to append to the main WHERE clause. 705 * } 706 */ 707 protected function get_sql_for_clause( $query, $parent_query ) { 708 global $wpdb; 709 710 // The sub-parts of a $where part. 711 $where_parts = array(); 712 713 $column = ( ! empty( $query['column'] ) ) ? esc_sql( $query['column'] ) : $this->column; 714 715 $column = $this->validate_column( $column ); 716 717 $compare = $this->get_compare( $query ); 718 719 $inclusive = ! empty( $query['inclusive'] ); 720 721 // Assign greater- and less-than values. 722 $lt = '<'; 723 $gt = '>'; 724 725 if ( $inclusive ) { 726 $lt .= '='; 727 $gt .= '='; 728 } 729 730 // Range queries. 731 if ( ! empty( $query['after'] ) ) { 732 $where_parts[] = $wpdb->prepare( "$column $gt %s", $this->build_mysql_datetime( $query['after'], ! $inclusive ) ); 733 } 734 if ( ! empty( $query['before'] ) ) { 735 $where_parts[] = $wpdb->prepare( "$column $lt %s", $this->build_mysql_datetime( $query['before'], $inclusive ) ); 736 } 737 // Specific value queries. 738 739 $date_units = array( 740 'YEAR' => array( 'year' ), 741 'MONTH' => array( 'month', 'monthnum' ), 742 '_wp_mysql_week' => array( 'week', 'w' ), 743 'DAYOFYEAR' => array( 'dayofyear' ), 744 'DAYOFMONTH' => array( 'day' ), 745 'DAYOFWEEK' => array( 'dayofweek' ), 746 'WEEKDAY' => array( 'dayofweek_iso' ), 747 ); 748 749 // Check of the possible date units and add them to the query. 750 foreach ( $date_units as $sql_part => $query_parts ) { 751 foreach ( $query_parts as $query_part ) { 752 if ( isset( $query[ $query_part ] ) ) { 753 $value = $this->build_value( $compare, $query[ $query_part ] ); 754 if ( $value ) { 755 switch ( $sql_part ) { 756 case '_wp_mysql_week': 757 $where_parts[] = _wp_mysql_week( $column ) . " $compare $value"; 758 break; 759 case 'WEEKDAY': 760 $where_parts[] = "$sql_part( $column ) + 1 $compare $value"; 761 break; 762 default: 763 $where_parts[] = "$sql_part( $column ) $compare $value"; 764 } 765 766 break; 767 } 768 } 769 } 770 } 771 772 if ( isset( $query['hour'] ) || isset( $query['minute'] ) || isset( $query['second'] ) ) { 773 // Avoid notices. 774 foreach ( array( 'hour', 'minute', 'second' ) as $unit ) { 775 if ( ! isset( $query[ $unit ] ) ) { 776 $query[ $unit ] = null; 777 } 778 } 779 780 $time_query = $this->build_time_query( $column, $compare, $query['hour'], $query['minute'], $query['second'] ); 781 if ( $time_query ) { 782 $where_parts[] = $time_query; 783 } 784 } 785 786 /* 787 * Return an array of 'join' and 'where' for compatibility 788 * with other query classes. 789 */ 790 return array( 791 'where' => $where_parts, 792 'join' => array(), 793 ); 794 } 795 796 /** 797 * Builds and validates a value string based on the comparison operator. 798 * 799 * @since 3.7.0 800 * 801 * @param string $compare The compare operator to use. 802 * @param string|array $value The value. 803 * @return string|false|int The value to be used in SQL or false on error. 804 */ 805 public function build_value( $compare, $value ) { 806 if ( ! isset( $value ) ) { 807 return false; 808 } 809 810 switch ( $compare ) { 811 case 'IN': 812 case 'NOT IN': 813 $value = (array) $value; 814 815 // Remove non-numeric values. 816 $value = array_filter( $value, 'is_numeric' ); 817 818 if ( empty( $value ) ) { 819 return false; 820 } 821 822 return '(' . implode( ',', array_map( 'intval', $value ) ) . ')'; 823 824 case 'BETWEEN': 825 case 'NOT BETWEEN': 826 if ( ! is_array( $value ) || 2 !== count( $value ) ) { 827 $value = array( $value, $value ); 828 } else { 829 $value = array_values( $value ); 830 } 831 832 // If either value is non-numeric, bail. 833 foreach ( $value as $v ) { 834 if ( ! is_numeric( $v ) ) { 835 return false; 836 } 837 } 838 839 $value = array_map( 'intval', $value ); 840 841 return $value[0] . ' AND ' . $value[1]; 842 843 default: 844 if ( ! is_numeric( $value ) ) { 845 return false; 846 } 847 848 return (int) $value; 849 } 850 } 851 852 /** 853 * Builds a MySQL format date/time based on some query parameters. 854 * 855 * You can pass an array of values (year, month, etc.) with missing parameter values being defaulted to 856 * either the maximum or minimum values (controlled by the $default_to parameter). Alternatively you can 857 * pass a string that will be passed to date_create(). 858 * 859 * @since 3.7.0 860 * 861 * @param string|array $datetime An array of parameters or a strotime() string 862 * @param bool $default_to_max Whether to round up incomplete dates. Supported by values 863 * of $datetime that are arrays, or string values that are a 864 * subset of MySQL date format ('Y', 'Y-m', 'Y-m-d', 'Y-m-d H:i'). 865 * Default: false. 866 * @return string|false A MySQL format date/time or false on failure 867 */ 868 public function build_mysql_datetime( $datetime, $default_to_max = false ) { 869 if ( ! is_array( $datetime ) ) { 870 871 /* 872 * Try to parse some common date formats, so we can detect 873 * the level of precision and support the 'inclusive' parameter. 874 */ 875 if ( preg_match( '/^(\d{4})$/', $datetime, $matches ) ) { 876 // Y 877 $datetime = array( 878 'year' => (int) $matches[1], 879 ); 880 881 } elseif ( preg_match( '/^(\d{4})\-(\d{2})$/', $datetime, $matches ) ) { 882 // Y-m 883 $datetime = array( 884 'year' => (int) $matches[1], 885 'month' => (int) $matches[2], 886 ); 887 888 } elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2})$/', $datetime, $matches ) ) { 889 // Y-m-d 890 $datetime = array( 891 'year' => (int) $matches[1], 892 'month' => (int) $matches[2], 893 'day' => (int) $matches[3], 894 ); 895 896 } elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2}) (\d{2}):(\d{2})$/', $datetime, $matches ) ) { 897 // Y-m-d H:i 898 $datetime = array( 899 'year' => (int) $matches[1], 900 'month' => (int) $matches[2], 901 'day' => (int) $matches[3], 902 'hour' => (int) $matches[4], 903 'minute' => (int) $matches[5], 904 ); 905 } 906 907 // If no match is found, we don't support default_to_max. 908 if ( ! is_array( $datetime ) ) { 909 $wp_timezone = wp_timezone(); 910 911 // Assume local timezone if not provided. 912 $dt = date_create( $datetime, $wp_timezone ); 913 914 if ( false === $dt ) { 915 return gmdate( 'Y-m-d H:i:s', false ); 916 } 917 918 return $dt->setTimezone( $wp_timezone )->format( 'Y-m-d H:i:s' ); 919 } 920 } 921 922 $datetime = array_map( 'absint', $datetime ); 923 924 if ( ! isset( $datetime['year'] ) ) { 925 $datetime['year'] = current_time( 'Y' ); 926 } 927 928 if ( ! isset( $datetime['month'] ) ) { 929 $datetime['month'] = ( $default_to_max ) ? 12 : 1; 930 } 931 932 if ( ! isset( $datetime['day'] ) ) { 933 $datetime['day'] = ( $default_to_max ) ? (int) gmdate( 't', mktime( 0, 0, 0, $datetime['month'], 1, $datetime['year'] ) ) : 1; 934 } 935 936 if ( ! isset( $datetime['hour'] ) ) { 937 $datetime['hour'] = ( $default_to_max ) ? 23 : 0; 938 } 939 940 if ( ! isset( $datetime['minute'] ) ) { 941 $datetime['minute'] = ( $default_to_max ) ? 59 : 0; 942 } 943 944 if ( ! isset( $datetime['second'] ) ) { 945 $datetime['second'] = ( $default_to_max ) ? 59 : 0; 946 } 947 948 return sprintf( '%04d-%02d-%02d %02d:%02d:%02d', $datetime['year'], $datetime['month'], $datetime['day'], $datetime['hour'], $datetime['minute'], $datetime['second'] ); 949 } 950 951 /** 952 * Builds a query string for comparing time values (hour, minute, second). 953 * 954 * If just hour, minute, or second is set than a normal comparison will be done. 955 * However if multiple values are passed, a pseudo-decimal time will be created 956 * in order to be able to accurately compare against. 957 * 958 * @since 3.7.0 959 * 960 * @param string $column The column to query against. Needs to be pre-validated! 961 * @param string $compare The comparison operator. Needs to be pre-validated! 962 * @param int|null $hour Optional. An hour value (0-23). 963 * @param int|null $minute Optional. A minute value (0-59). 964 * @param int|null $second Optional. A second value (0-59). 965 * @return string|false A query part or false on failure. 966 */ 967 public function build_time_query( $column, $compare, $hour = null, $minute = null, $second = null ) { 968 global $wpdb; 969 970 // Have to have at least one. 971 if ( ! isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) { 972 return false; 973 } 974 975 // Complex combined queries aren't supported for multi-value queries. 976 if ( in_array( $compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true ) ) { 977 $return = array(); 978 979 $value = $this->build_value( $compare, $hour ); 980 if ( false !== $value ) { 981 $return[] = "HOUR( $column ) $compare $value"; 982 } 983 984 $value = $this->build_value( $compare, $minute ); 985 if ( false !== $value ) { 986 $return[] = "MINUTE( $column ) $compare $value"; 987 } 988 989 $value = $this->build_value( $compare, $second ); 990 if ( false !== $value ) { 991 $return[] = "SECOND( $column ) $compare $value"; 992 } 993 994 return implode( ' AND ', $return ); 995 } 996 997 // Cases where just one unit is set. 998 if ( isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) { 999 $value = $this->build_value( $compare, $hour ); 1000 if ( false !== $value ) { 1001 return "HOUR( $column ) $compare $value"; 1002 } 1003 } elseif ( ! isset( $hour ) && isset( $minute ) && ! isset( $second ) ) { 1004 $value = $this->build_value( $compare, $minute ); 1005 if ( false !== $value ) { 1006 return "MINUTE( $column ) $compare $value"; 1007 } 1008 } elseif ( ! isset( $hour ) && ! isset( $minute ) && isset( $second ) ) { 1009 $value = $this->build_value( $compare, $second ); 1010 if ( false !== $value ) { 1011 return "SECOND( $column ) $compare $value"; 1012 } 1013 } 1014 1015 // Single units were already handled. Since hour & second isn't allowed, minute must to be set. 1016 if ( ! isset( $minute ) ) { 1017 return false; 1018 } 1019 1020 $format = ''; 1021 $time = ''; 1022 1023 // Hour. 1024 if ( null !== $hour ) { 1025 $format .= '%H.'; 1026 $time .= sprintf( '%02d', $hour ) . '.'; 1027 } else { 1028 $format .= '0.'; 1029 $time .= '0.'; 1030 } 1031 1032 // Minute. 1033 $format .= '%i'; 1034 $time .= sprintf( '%02d', $minute ); 1035 1036 if ( isset( $second ) ) { 1037 $format .= '%s'; 1038 $time .= sprintf( '%02d', $second ); 1039 } 1040 1041 return $wpdb->prepare( "DATE_FORMAT( $column, %s ) $compare %f", $format, $time ); 1042 } 1043 }
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