WordPress at a glance
function is not described

SimplePie_Cache_File::mtime() public WP 1.0

Retrieve the last modified time for the cache

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

No Hooks.

Return

Int. Timestamp

Usage

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

Code of SimplePie_Cache_File::mtime() WP 5.7.2

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