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PHP Session problem Notice: Undefined index:

Discussion in 'PHP' started by moath11, Jul 28, 2014.

  1. #1
    Hi guys,
    when switched to the newer version of php
    i got some problems with sessions

    the scenario is
    file: login.php
    SEMrush
    <?php
    session_start();

    $_SESSION['Username'] = $Username = $_POST['login'];
    $_SESSION['Password'] = $Password = $_POST['password'];
    header("Location: proccess.php");
    ?>


    now some another page

    file: parse.php

    <?php
    session_start();
    $Username = $_SESSION['Username'];
    $Password = $_SESSION['Password'];

    echo $Username;
    echo "\n";
    echo $Username;

    ?>



    now the problem is in parse.php when it's executed

    Notice: Undefined index: Username in C:\xampp\htdocs\clients\parse.php on line 3

    Notice: Undefined index: Password in C:\xampp\htdocs\clients\parse.php on line 4


    can anyone help me plz
     
    moath11, Jul 28, 2014 IP
    SEMrush
  2. moath11

    moath11 Peon

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    #2
    fixed

    the problem was because the <?
    it should be <?php
     
    moath11, Jul 28, 2014 IP
  3. Krellen

    Krellen Greenhorn

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    #3
    You are getting that error most likely because the $_SESSION['Username'] variable/index doesn't exist in the session array. To avoid that error/notice, you'd want to check for that variable before using it.

    For example:
    
    if (!empty($_SESSION['Username'])) {
        $Username = $_SESSION['Username'];
    }
    
    Code (markup):
    Or if you are using a new version of PHP, you could do something like this when assigning variables:

    
    $Username = $_SESSION['Username'] ?: null;
    $Password = $_SESSION['Password'] ?: null;
    
    Code (markup):
    The same method could be used in your login.php script when accessing the $_POST variables.
     
    Krellen, Sep 10, 2014 IP
  4. Vibrantu

    Vibrantu Greenhorn

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    #4
    You can use even isset function to check whether session variable is set or not

    if(isset($_SESSION['Username']))
    {
    echo $_SESSION['username'];
    }
    Code (markup):
     
    Vibrantu, Sep 11, 2014 IP