function _memoryCacheAdd($data)
{
$this->_memoryCachingArray[$this->_file] = $data;
if ($this->_memoryCachingCounter >= $this->_memoryCachingLimit) {
list($key, ) = each($this->_memoryCachingArray);
unset($this->_memoryCachingArray[$key]);
} else {
$this->_memoryCachingCounter = $this->_memoryCachingCounter + 1;
}
}