library/Rediska/Serializer/Adapter/PhpSerialize.php
public function catchUnserializeNotice($errno, $errstr, $errfile, $errline, $errcontext)
    {
        if (!error_reporting() && strpos($errstr, 'unserialize()') !== false) {
            $this->_unserialized = false;
            return true;
        } else {
            return false;
        }
    }
public function catchUnserializeNotice($errno, $errstr, $errfile, $errline, $errcontext)
    {
        if (!error_reporting() && strpos($errstr, 'unserialize()') !== false) {
            $this->_unserialized = false;
            return true;
        } else {
            return false;
        }
    }
Catch unserialize notice