WordPress at a glance
function is not described

SimplePie_Cache_Memcache::mtime() public WP 1.0

Retrieve the last modified time for the cache

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

No Hooks.

Return

Int. Timestamp

Usage

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

Code of SimplePie_Cache_Memcache::mtime() WP 5.7.2

<?php
public function mtime()
{
	$data = $this->cache->get($this->name);

	if ($data !== false)
	{
		// essentially ignore the mtime because Memcache expires on its own
		return time();
	}

	return false;
}