执行后:
PHP Notice: Undefined index: name in c:\inetpub\wwwroot\test\gbook.php on line 5 PHP Notice: Undefined index: email in c:\inetpub\wwwroot\test\gbook.php on line 7 PHP Notice: Undefined index: phone in c:\inetpub\wwwroot\test\gbook.php on line 9 PHP Notice: Undefined index: subject in c:\inetpub\wwwroot\test\gbook.php on line 12 PHP Notice: Undefined index: word in c:\inetpub\wwwroot\test\gbook.php on line 16