unsetting sessions vars

[ksmatthews]

HI There,

 

My display pages that display table data use session vars that 'remember' SQL queries for example when that page is reloaded

 

When I click on another display page these previous page specific session vars need to be unset before the new display page is displayed. I want to do this WITHOUT adding unset(<session cookie>) at the beginning of every display page.

 

I only need to unset these session vars ONCE - when the page is FIRST loaded, NOT every time .

 

Is it possible to UNSET session vars as one goes from one page to another ??

 

regards,

 

Steven M

[redarrow]

look up session_destroy()

[PFMaBiSmAd]

Detect when the page changes and clear your variables when a different page is detected -

<?php
session_start();
$_SESSION['last_page'] = isset($_SESSION['last_page']) ? $_SESSION['last_page'] : FALSE; // set default value if not set
if($_SERVER['REQUEST_URI'] <> $_SESSION['last_page']){
// this is a different page
// clear any variables here

$_SESSION['last_page'] = $_SERVER['REQUEST_URI']; // set the 'last_page' to be the current page
}
?>

[ksmatthews]

HI THere,

 

THanks a lot for that. Your code works well ..

 

<?php

session_start();

$_SESSION['last_page'] = isset($_SESSION['last_page']) ? $_SESSION['last_page'] : FALSE; // set default value if not set

if($_SERVER['REQUEST_URI'] <> $_SESSION['last_page']){

  // this is a different page

  // clear any variables here

 

  $_SESSION['last_page'] = $_SERVER['REQUEST_URI']; // set the 'last_page' to be the current page

}

?>

 

However if there are vars appended to the URI it might not work as intended

 

For example ...

 

http://localhost/swordfish2/system_admin_display.php?page=1 AND

http://localhost/swordfish2/system_admin_display.php?page=2

 

do not have the same $_SERVER['REQUEST_URI'] even though the base URL is the same.

 

If this code is prepended, it works a s expected ..

 

// trim URI to remove any params, if any, from URI string

$URI_array = explode("?", $_SERVER['REQUEST_URI']);

$_SERVER['REQUEST_URI'] = $URI_array[0];

 

Thanks again,

 

Steven M

 

[PFMaBiSmAd]

Use $_SERVER['SCRIPT_NAME'] instead. I specifically used 'REQUEST_URI' because something like ?page=1, ?page=2 would mean different pages in most cases.