php Undefined variable和 Undefined index
undefined variable和 undefined index：出现这种问题是变量未定义了，我们只要把加个验证如
$a =isset($_get['aa'])?$_get['aa']:'变量未定义';
这样未定义变量也不会出现undefined variable和undefined index提示，同时我们还提供在php ini或在php中设置错误不提示的方法。
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
教程链接:
随意转载~但请保留教程地址★
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