rest_validate_json_schema_pattern( string $pattern, string $value )

Source

File: wp-includes/rest-api.php

function rest_validate_json_schema_pattern( $pattern, $value ) {
	$escaped_pattern = str_replace( '#', '\\#', $pattern );

	return 1 === preg_match( '#' . $escaped_pattern . '#u', $value );
}