WordPress at a glance
function is not described

SimplePie_Cache_Memcache::touch() public WP 1.0

Set the last modified time to the current time

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

No Hooks.

Return

true|false. Success status

Usage

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

Code of SimplePie_Cache_Memcache::touch() WP 5.7.2

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

	if ($data !== false)
	{
		return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);
	}

	return false;
}