session variable is not retained when switching pages

[Juarez]

 

 

 

Hi I'm learning PHP sessions variables.

 

I have a HTML form as below. When I submit the form it passes the entered value as a session variable to processform.php page. (see the code below) This works and I can echo out the variable on the page however when I go to a different page and come back to processform.php the variable has been cleared and I get "Undefined index: name.." on the line where the session variable is set. Session variables should be retained when you come back to the page so what am I missing to do this.

I am testing on  local host by the way.

 

 

 

Many thanks

 

 

 

 

 

 

<strong>Test Form</strong>
<form method="post" action="processform.php"><br/><br/>
<input type="text" name="name" value="testValue" /><br/><br/>
<input type="submit" name="submit"/><br/><br/>

</form>

 

 

 

 

<?php
session_start();

include("menu.php"); 
echo "<br />";

$_SESSION['name']=$_POST['name'];

echo $_SESSION['name'];


?>

[Psycho]

I would guess that error is because $_POST['name'] is not set. That results in $_SESSION['name'] being overwritten with a NULL value

[Barand]

instead of

$_SESSION['name']=$_POST['name'];

 

try

if (isset($_POST['name'])) {
    $_SESSION['name']=$_POST['name'];
}

[Juarez]

 

 

Great thanks,

I was wondering whether I should be using  'isset' while searching around.