Client/MemcacheClient.php
public function get($key)
    {
        if ($this->isSafe()) {
            $key = $this->prefix . $key;
            return $this->mem->get($key);
        }

        return false;
    }
public function get($key)
    {
        if ($this->isSafe()) {
            $key = $this->prefix . $key;
            return $this->mem->get($key);
        }

        return false;
    }
Retrieve a value from memcache

@param string|array $key Unique identifier or array of identifiers
@access public
@return mixed Requested value, or false if an error occurs