单击提交按钮进行连接时，出现此错误。
Notice: unserialize(): Error at offset 0 of 9 bytes in /var/www/Blog/Symfony/vendor/doctrine/dbal/lib/Doctrine/DBAL/Types/ArrayType.php line 48
要点：https : //gist.github.com/AnthonyPavaux/5104546
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