修复php中的错误

Question

I have been getting the following errors in my php file:

Notice: Undefined index: errStr in /clientdata/zeus-dynamic-1/c/r/crowndoor.com.au/www/crowntest/contact.php on line 13

Notice: Undefined index: sent in /clientdata/zeus-dynamic-1/c/r/crowndoor.com.au/www/crowntest/contact.php on line 20

which appear at the top of the browser window. I have tried turning off notices using: error_reporting(E_ALL ^ E_NOTICE); but it doesn't seem to make any difference. I am now attempting to fix the undefined indexes. my php is as follows:

<?php
session_name("fancyform");
session_start();


$_SESSION['n1'] = rand(1,20);
$_SESSION['n2'] = rand(1,20);
$_SESSION['expect'] = $_SESSION['n1']+$_SESSION['n2'];


$str='';
if($_SESSION['errStr'])
{
    $str='<div class="error">'.$_SESSION['errStr'].'</div>';
    unset($_SESSION['errStr']);
}
if (!isset($_POST['errStr'])) 
{
//If not isset -> set with dumy value 
$_POST['errStr'] = "undefine"; 
}

$success='';
if($_SESSION['sent'])
{
    $success='<h1>Thank you!</h1>';

    $css='<style type="text/css">#contact-form{display:none;}</style>';

    unset($_SESSION['sent']);
}
?>

If anyone has any thoughts about how to fix these notices from appearing that would be great.

Answer 1

It means the array index you're looking for does not exist. The two ways to handle that are to either make sure it exists, then this error message would be pointing out a logic flaw in your app. Or, if the index may legitimately not exist, use isset to check before accessing it. See The Definitive Guide To PHP's isset And empty .

Answer 2

在php页面的顶部添加代码。

<?php error_reporting(0); ?>

Answer 3

你为什么不像使用$_POST['errStr']一样使用isset() ？

Answer 4

您需要先检查密钥是否存在。

if(isset($_SESSION['errStr']) && $_SESSION['errStr']) {

Answer 5

Change line 13:

if($_SESSION['errStr'])

To:

if(isset($_SESSION['errStr']))

Answer 6

You can however check manually yourself without interfering the php.ini setting as it will add more complication on the deployment when you migrate your server one day.

To check manually, please see the following code...you have done it in a line somewhere in your code though...

<?php
if (isset($_SESSION['sent'])) {
    $success='<h1>Thank you!</h1>';
    $css='<style type="text/css">#contact-form{display:none;}</style>';
        unset($_SESSION['sent']);
}
?>

Answer 7

Turn of notices like:

error_reporting(E_ALL & ~E_NOTICE )

and/or check the existance of the array keys first.

$sent = array_key_exists('sent', $_SESSION) ? $_SESSION['sent'] : null;