PHPCMS后台设置角色权限时，突然出现500错误，怎么解决呢?
在PHPcms后台设置角色权限时，点击默认站点出现500错误，如上图。
正常情况下如下图所示。本来好好的，不知道怎么的就突然不好使了，请高手解答？？这是怎么回事呢？
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那个请求有严重的语法错误了吧，进去下断点看看
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看错误。
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500 是服务器拒绝响应，一般是 php 程序出现了错误。
你不给出错误信息，神仙也帮不了你
如果说 本地的正常，服务器上的不正常 那么只能说明程序没有语法错误，但不表示不出现逻辑错误
比如 除0、变量值非法、字段找不到、。。。。
另外还与 php 版本、配置都有关系
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像文件夹读写权限，路径，php版本，php环境设置，服务器软件不同，都可能引起错误
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