php session_start default value?

Question

I have a question regarding a session variable.

I have session variable which needs to start at a default variable. Then I need to be able to pass a new one through $_GET and keep that updated. So that even if the user reloads the page, it does not go back to the default value. How might I go about doing this? Thanks!

Just program each step of the algorithm you've described and ask a specific question when you'll have it. — zerkms
– zerkms, Commented Mar 5, 2011 at 3:36

zerkms · Accepted Answer · 2011-03-05 03:56:44Z

2

With this snippet you'll have session variable assigning once:

if (!isset($_SESSION['magic'])) {
    $_SESSION['magic'] = isset($_GET['magic']) ? $_GET['magic'] : 1;
}

edited Mar 5, 2011 at 3:56

answered Mar 5, 2011 at 3:48

zerkms

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1 Comment

rick Over a year ago

would I just add: else $_SESSION['magic'] = 1; (or whatever I want my default to be?) because unfortunately that is breaking it ha

Jordan Owens · Accepted Answer · 2011-03-05 03:58:09Z

0

Seems like something along these lines might work:

if(!isset($_SESSION['my_parm']))
{
  $_SESSION['my_parm'] = 'DEFAULT';
}

if(isset($_GET['my_parm']))
{
  $_SESSION['my_parm']=$my_parm;
}

answered Mar 5, 2011 at 3:58

Jordan Owens

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1 Comment

rick Over a year ago

Unfortunately this is not working. After I change pages on my pagination, it does not stay at the amount of pages I want to show (my mysql LIMIT) which is the get variable I am trying to pass

sush · Accepted Answer · 2011-03-05 03:42:22Z

0

Use

session_start();
$_SESSION

below is the link for session manual

http://www.php.net/manual/en/reserved.variables.session.php

answered Mar 5, 2011 at 3:42

sush

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2 Comments

rick Over a year ago

Right, but I need to be able to update it to a $_GET variable, and then keep that even if the page is reloaded, and not go back to the starting default value

sush Over a year ago

@rick , you can do it as per zerkms answer

scoffey · Accepted Answer · 2011-03-05 03:57:21Z

0

If I understood well, this would be an outline of your method:

<?php
session_start();
if (isset($_GET['my_variable'])) {
    $_SESSION['my_variable'] = $_GET['my_variable']; // force new value
}
if (!isset($_SESSION['my_variable'])) {
    $_SESSION['my_variable'] = $default_value; // initialize
}
update_value($_SESSION['my_variable']);

answered Mar 5, 2011 at 3:57

scoffey

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