WordPress at a glance
function is not described

SimplePie_Cache_File::touch() public WP 1.0

Set the last modified time to the current time

{} It's a method of the class: SimplePie_Cache_File{}

No Hooks.

Return

true|false. Success status

Usage

$SimplePie_Cache_File = new SimplePie_Cache_File();
$SimplePie_Cache_File->touch();

Code of SimplePie_Cache_File::touch() WP 5.7.2

<?php
public function touch()
{
	return @touch($this->name);
}