function is_allowed_http_origin( $origin = null
) { $origin_arg =
$origin;
if ( null ===
$origin ) { $origin =
get_http_origin();
} if ( $origin && !
in_array( $origin,
get_allowed_http_origins(), true
) ) { $origin = '';
} /**
* Change the allowed HTTP origin result.
*
* @since 3.4.0
*
* @param string $origin Origin URL if allowed, empty string if not.
* @param string $origin_arg Original origin string passed into is_allowed_http_origin function.
*/