kernel/lib/Cache/File.php
public function get(string $sName, int &$iFlags = null, int $iTimeout = 0)
    {
        if ($iTimeout > 0 && file_exists($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac')
            && time() - filemtime($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac') > $iTimeout) {

            unlink($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac');
        }

        if (file_exists($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac')) {

            return unserialize(file_get_contents($this->_sFolder . $this->_getSubDirectory($sName) . md5($sName) . '.fil.cac'));
        } else {

            return false;
        }
    }
public function get(string $sName, int &$iFlags = null, int $iTimeout = 0)
    {
        if ($iTimeout > 0 && file_exists($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac')
            && time() - filemtime($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac') > $iTimeout) {

            unlink($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac');
        }

        if (file_exists($this->_sFolder.$this->_getSubDirectory($sName).md5($sName).'.fil.cac')) {

            return unserialize(file_get_contents($this->_sFolder . $this->_getSubDirectory($sName) . md5($sName) . '.fil.cac'));
        } else {

            return false;
        }
    }
get a value

@access public
@param  string $sName name of the session
@param  int $iFlags flags
@param  int $iTimeout expiration of cache
@return mixed