WordPress at a glance
function is not described

logIO() WP 1.0

Deprecated in 3.4.0. It is no longer supported and can be removed in future releases. Use error_log() instead.

logIO() - Writes logging info to a file.

  • See: error_log()

No Hooks.

Return

Nothing (null).

Usage

logIO( $io, $msg );
$io(string) (required)
Whether input or output
$msg(string) (required)
Information describing logging reason.

Code of logIO: xmlrpc.php WP 5.2.2

<?php
function logIO( $io, $msg ) {
	_deprecated_function( __FUNCTION__, '3.4.0', 'error_log()' );
	if ( ! empty( $GLOBALS['xmlrpc_logging'] ) ) {
		error_log( $io . ' - ' . $msg );
	}
}