yii\caching\MemCache::deleteValue PHP Method

Deletes a value with the specified key from cache This is the implementation of the method declared in the parent class.

protected deleteValue ( string $key ) : boolean
$key	string	the key of the value to be deleted
return	boolean	if no error happens during deletion

    protected function deleteValue($key)
    {
        return $this->_cache->delete($key, 0);
    }

MemCache