public function customErrorHandler($errno, $errstr) {
		if ($this->_isActive('phpException')) {
			$check = 'phpException';
			$level = $this->_config->getTestLevel($check);
			if ($level === null) {
				$level = WARNING;
			}
			$message = $this->_getMessage('PHP_EXPCEPTION', $errstr);

			$this->_writeError($check, $message, $this->lineNumber, $level);
		}

		/* Don't execute PHP internal error handler */
		return false;
	}