Uses
| Uses | Description | 
|---|---|
| wp-includes/functions.php: _deprecated_function() | Mark a function as deprecated and inform when it has been used. | 
This function has been deprecated. Use error_log() instead.
logIO() – Writes logging info to a file.
(string) (Required) Whether input or output
(string) (Required) Information describing logging reason.
File: xmlrpc.php
function logIO( $io, $msg ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
	_deprecated_function( __FUNCTION__, '3.4.0', 'error_log()' );
	if ( ! empty( $GLOBALS['xmlrpc_logging'] ) ) {
		error_log( $io . ' - ' . $msg );
	}
}  | Version | Description | 
|---|---|
| 3.4.0 | Introduced. | 
    © 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/functions/logio