php Undefined index和Undefined variable的解决方法_php技巧
$act=$_POST['act'];
用以上代码总是提示
Notice: Undefined index: act in F:\windsflybook\post.php on line 18
另外，有时还会出现
引用内容
Notice: Undefined variable: Submit ......
等一些这样的提示
原因：由于变量未定义引起的
解决方法：
1) error_reporting设置：
找到error_reporting = E_ALL
修改为error_reporting = E_ALL & ~E_NOTICE
2) register_globals设置：
找到register_globals = Off
修改为register_globals = On
Notice: Undefined variable: email in D:\PHP5\ENOTE\ADDNOTE.PHP on line 9
Notice: Undefined variable: subject in D:\PHP5\ENOTE\ADDNOTE.PHP on line 9
Notice: Undefined variable: comment in D:\PHP5\ENOTE\ADDNOTE.PHP on line 9
........
本来php是不需要定义变量的，但是出现这种情况应该怎么办呢?
只要在C:\WINDOWS找出php.ini的
在php.ini中的302行 error_reporting = E_ALL
修改成
error_reporting = E_ALL & ~E_NOTICE再重启apache2.2就行了
解决方法：修改php.ini
将： error_reporting = E_ALL
修改为：error_reporting = E_ALL & ~E_NOTICE
如果什么错误都不想让显示，直接修改：
display_errors = Off
如果你没有php.ini的修改权限,可在php头部加入
ini_set("error_reporting","E_ALL & ~E_NOTICE");
即可
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