让WordPress 实现标题精准搜索，不要模糊搜索

WordPress 默认的搜索是模糊搜索的，有时候想干点批量操作的事情会比较麻烦；比如wordpress批量加关键字。
到当前主题functions.php中加入下面的就可以了。

// 只搜索文章标题
function wpse_11826_search_by_title( $search, $wp_query ) {
    if ( ! empty( $search ) && ! empty( $wp_query->query_vars['search_terms'] ) ) {
        global $wpdb;
        $q = $wp_query->query_vars;
        $n = ! empty( $q['exact'] ) ? '' : '%';
        $search = array();
        foreach ( ( array ) $q['search_terms'] as $term )
            $search[] = $wpdb->prepare( "$wpdb->posts.post_title LIKE %s", $n . $wpdb->esc_like( $term ) . $n );
        if ( ! is_user_logged_in() )
            $search[] = "$wpdb->posts.post_password = ''";
        $search = ' AND ' . implode( ' AND ', $search );
    }
    return $search;
}
add_filter( 'posts_search', 'wpse_11826_search_by_title', 10, 2 );

// 只搜索文章标题

function wpse_11826_search_by_title( $search, $wp_query ) {

if ( ! empty( $search ) && ! empty( $wp_query->query_vars['search_terms'] ) ) {

global $wpdb;

$q = $wp_query->query_vars;

$n = ! empty( $q['exact'] ) ? '' : '%';

$search = array();

foreach ( ( array ) $q['search_terms'] as $term )

$search[] = $wpdb->prepare( "$wpdb->posts.post_title LIKE %s", $n . $wpdb->esc_like( $term ) . $n );

if ( ! is_user_logged_in() )

$search[] = "$wpdb->posts.post_password = ''";

$search = ' AND ' . implode( ' AND ', $search );

}

return $search;

}

add_filter( 'posts_search', 'wpse_11826_search_by_title', 10, 2 );