PHP中提示Notice: Undefined index 的解决方法

Notice : Undefined index: message in D:\PHPnow-1.5.1\PHPnow-1.5.1\htdocs\Zhongcaoyaocode\index.php on line 4 Notice : Undefined variable: contents in D:\PHPnow-1.5.1\PHPnow-1.5.1\htdocs\Zhongcaoyaocode\index.php on line 32 Notice : Use of

Notice: Undefined index: message in D:\PHPnow-1.5.1\PHPnow-1.5.1\htdocs\Zhongcaoyaocode\index.php on line 4

Notice: Undefined variable: contents in D:\PHPnow-1.5.1\PHPnow-1.5.1\htdocs\Zhongcaoyaocode\index.php on line32

Notice: Use of undefined constant id - assumed 'id' inD:\PHPnow-1.5.1\PHPnow-1.5.1\htdocs\Zhongcaoyaocode\index.php on line33

为了方便程序修改，可以用以下方法：

在开头加上 
error_reporting(E_ALL & ~E_NOTICE); // 这句话表示提示除去 E_NOTICE 之外的所有错误信息 

或者在每个文件头上加

error_reporting(0);

这样以来，Notice信息就不再显示了。