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为什么WAMP里PHP开户了display errors后不能创建图片,该怎么处理

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Release： 2016-06-13 13:49:12
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为什么WAMP里PHP开户了display errors后不能创建图片
请问？
为什么WAMP里PHP开户了display errors后不能创建图片，以至于不能创建验证码。

关掉display errors后，又能创建图片了。

------解决方案--------------------
每次用全局变量，都用isset检测一下。
比如$sess=isset($_SESSION['mysession'])?$_SESSION['mysession']:"";
对于图片，还要检测是否有BOM。

Related labels：
display errors isset session
source：php.cn
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