wp-includes/class-wp-date-query.php:280Validates the given date_query values and triggers errors if something is not valid.
$date_queryarrayoptionalarray()bool public function validate_date_values( $date_query = array() ) { if ( empty( $date_query ) ) { return false; } $valid = true; /* * Validate 'before' and 'after' up front, then let the * validation routine continue to be sure that all invalid * values generate errors too. */ if ( array_key_exists( 'before', $date_query ) && is_array( $date_query['before'] ) ) { $valid = $this->validate_date_values( $date_query['before'] ); } if ( array_key_exists( 'after', $date_query ) && is_array( $date_query['after'] ) ) { $valid = $this->validate_date_values( $date_query['after'] ); } // Array containing all min-max checks. $min_max_checks = array(); // Days per year. if ( array_key_exists( 'year', $date_query ) ) { /* * If a year exists in the date query, we can use it to get the days. * If multiple years are provided (as in a BETWEEN), use the first one. */ if ( is_array( $date_query['year'] ) ) { $_year = reset( $date_query['year'] ); } else { $_year = $date_query['year']; } $max_days_of_year = (int) gmdate( 'z', mktime( 0, 0, 0, 12, 31, $_year ) ) + 1; } else { // Otherwise we use the max of 366 (leap-year). $max_days_of_year = 366; } $min_max_checks['dayofyear'] = array( 'min' => 1, 'max' => $max_days_of_year, ); // Days per week. $min_max_checks['dayofweek'] = array( 'min' => 1, 'max' => 7, ); // Days per week. $min_max_checks['dayofweek_iso'] = array( 'min' => 1, 'max' => 7, ); // Months per year. $min_max_checks['month'] = array( 'min' => 1, 'max' => 12, ); // Weeks per year. if ( isset( $_year ) ) { /* * If we have a specific year, use it to calculate number of weeks. * Note: the number of weeks in a year is the date in which Dec 28 appears. */ $week_count = gmdate( 'W', mktime( 0, 0, 0, 12, 28, $_year ) ); } else { // Otherwise set the week-count to a maximum of 53. $week_count = 53; } $min_max_checks['week'] = array( 'min' => 1, 'max' => $week_count,Introduced in 4.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-date-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.