wp-includes/class-wp-query.php:1423Generates SQL for the WHERE clause based on passed search terms.
$qarraystring2 hooks fire while WP_Query::parse_search() runs, in this order:
Filters the columns to search in a WP_Query search.
Filters the prefix that indicates that a search term should be excluded from results.
protected function parse_search( &$q ) { global $wpdb; $search = ''; // Added slashes screw with quote grouping when done early, so done later. $q['s'] = stripslashes( $q['s'] ); if ( empty( $_GET['s'] ) && $this->is_main_query() ) { $q['s'] = urldecode( $q['s'] ); } // There are no line breaks in <input /> fields. $q['s'] = str_replace( array( "\r", "\n" ), '', $q['s'] ); $q['search_terms_count'] = 1; if ( ! empty( $q['sentence'] ) ) { $q['search_terms'] = array( $q['s'] ); } else { if ( preg_match_all( '/".*?("|$)|((?<=[\t ",+])|^)[^\t ",+]+/', $q['s'], $matches ) ) { $q['search_terms_count'] = count( $matches[0] ); $q['search_terms'] = $this->parse_search_terms( $matches[0] ); // If the search string has only short terms or stopwords, or is 10+ terms long, match it as sentence. if ( empty( $q['search_terms'] ) || count( $q['search_terms'] ) > 9 ) { $q['search_terms'] = array( $q['s'] ); } } else { $q['search_terms'] = array( $q['s'] ); } } $n = ! empty( $q['exact'] ) ? '' : '%'; $searchand = ''; $q['search_orderby_title'] = array(); $default_search_columns = array( 'post_title', 'post_excerpt', 'post_content' ); $search_columns = ! empty( $q['search_columns'] ) ? $q['search_columns'] : $default_search_columns; if ( ! is_array( $search_columns ) ) { $search_columns = array( $search_columns ); } /** * Filters the columns to search in a WP_Query search. * * The supported columns are `post_title`, `post_excerpt` and `post_content`. * They are all included by default. * * @since 6.2.0 * * @param string[] $search_columns Array of column names to be searched. * @param string $search Text being searched. * @param WP_Query $query The current WP_Query instance. */ $search_columns = (array) apply_filters( 'post_search_columns', $search_columns, $q['s'], $this ); // Use only supported search columns. $search_columns = array_intersect( $search_columns, $default_search_columns ); if ( empty( $search_columns ) ) { $search_columns = $default_search_columns; } /** * Filters the prefix that indicates that a search term should be excluded from results. * * @since 4.7.0 * * @param string $exclusion_prefix The prefix. Default '-'. Returning * an empty value disables exclusions. */ $exclusion_prefix = apply_filters( 'wp_query_search_exclusion_prefix', '-' ); foreach ( $q['search_terms'] as $term ) { // If there is an $exclusion_prefix, terms prefixed with it should be excluded. $exclude = $exclusion_prefix && str_starts_with( $term, $exclusion_prefix ); if ( $exclude ) { $like_op = 'NOT LIKE'; $andor_op = 'AND'; $term = substr( $term, 1 ); } else { $like_op = 'LIKE'; $andor_op = 'OR'; }Introduced in 3.7.0. 2 changes between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
$query_vars added.verified against source$q removed.verified against sourcesrc/wp-includes/class-wp-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.