WP_Query::parse_search_terms() WordPress Method

The parse_search_terms() method is used to parse search terms into an array. It accepts an array of terms as its parameter. The method returns an array of terms, with each term being an array of terms.

WP_Query::parse_search_terms( string[] $terms ) #

Check if the terms are suitable for searching.

Description
Parameters
Return
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Description

Uses an array of stopwords (terms) that are excluded from the separate term matching when searching for posts. The list of English stopwords is the approximate search engines list, and is translatable.

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Parameters

$terms: (string[])(Required)Array of terms to check.

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Return

(string[]) Terms that are not stopwords.

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Source

File: wp-includes/class-wp-query.php

protected function parse_search_terms( $terms ) {
    $strtolower = function_exists( 'mb_strtolower' ) ? 'mb_strtolower' : 'strtolower';
    $checked    = array();
 
    $stopwords = $this->get_search_stopwords();
 
    foreach ( $terms as $term ) {
        // Keep before/after spaces when term is for exact match.
        if ( preg_match( '/^".+"$/', $term ) ) {
            $term = trim( $term, "\"'" );
        } else {
            $term = trim( $term, "\"' " );
        }
 
        // Avoid single A-Z and single dashes.
        if ( ! $term || ( 1 === strlen( $term ) && preg_match( '/^[a-z\-]$/i', $term ) ) ) {
            continue;
        }
 
        if ( in_array( call_user_func( $strtolower, $term ), $stopwords, true ) ) {
            continue;
        }
 
        $checked[] = $term;
    }
 
    return $checked;
}