How to store referring URL in a Session variable

[rahia307]

hi
every body.
i have problem in login.
the problem is that
i want to redirect page where i come from login
in other word i want to store url in session
please help me for it

[Atli]

If you follow a link into a .php page, PHP stores the URL of the page you came from in the &_SERVER['HTTP_REFERER'] index.

So when you enter your login form you could do something like this to get a link back to the page you came from:

echo '<a href="'. $_SERVER['HTTP_REFERER'] . '">Go back</a>';
 

You can also get the current page you are on by using the $_SERVER['PHP_SELF'] index.
This on is defferent, however, as it does not store the host URL.
That is, if the URL is: http://mypage.com/files/index.php
the PHP_SELF stores: /files/index.php

[pbmods]

Changed thread title to better describe the problem.

[rahia307]

If you follow a link into a .php page, PHP stores the URL of the page you came from in the &_SERVER['HTTP_REFERER'] index.

So when you enter your login form you could do something like this to get a link back to the page you came from:

echo '<a href="'. $_SERVER['HTTP_REFERER'] . '">Go back</a>';
 

You can also get the current page you are on by using the $_SERVER['PHP_SELF'] index.
This on is defferent, however, as it does not store the host URL.
That is, if the URL is: http://mypage.com/files/index.php
the PHP_SELF stores: /files/index.php

hi
thanks
but it redirect same page login page
but i want to redirect before login i visited page
please help me

[Atli]

Ok, lets see...

The REFERER index only stores the last page you were on. So you would need your code to remember the REFERER value as it was when you entered your login page.

Lets say I have a login.php where I have a form that, when submitted, sends me to a submit.php, which processes the form data. Now, if I call REFERED in the submit page, I get sent back to the login page, which is not what we want.

What I need to do, is store the REFERER value as it is when I enter the login.php page. To do this I can use the $_SESSION array.
But I must be carefull not to write the loging page in the SESSION if the REFERER value is the login.php, which could happen if there is a link to it somwhere.
So, my login.php page would start like this:

// Start a session
session_start();
 
// Make sure the REFERER value is
// not pointing to the login.php page.
if(strstr($_SESSION['HTTP_REFERER'], "login.php") == false)
{
  // Save the value in the $_SESSION array
  $_SESSION['beforeLogin'] = $_SERVER['HTTP_REFERER'];
}
 

Now, in the submit page, after I proccess the form data, I will have to redirect to the value saved in the $_SESSION array.
That might look something like this:

// Start session
session_start();
 
// Make sure the session variable is set.
// If it is not, the login page must not
// have had any value to save so we
// must redirect somewhere else.
if(!isset($_SESSION['beforeLogin']))
{
  // Redirect to some general place
  header("Location: http://mypage.com/home.php");
}
else
{
  // Lets get our variable
  $redirect = $_SESSION['beforeLogin'];
 
  // It is always good to unset session
  // variables when we stop using them.
  unset($_SESSION['beforeLogin']);
 
  // And now we redirect
  header("Location: ". $redirect);
}
 

I hope this clears it up a bit.

[rahia307]

Ok, lets see...

The REFERER index only stores the last page you were on. So you would need your code to remember the REFERER value as it was when you entered your login page.

Lets say I have a login.php where I have a form that, when submitted, sends me to a submit.php, which processes the form data. Now, if I call REFERED in the submit page, I get sent back to the login page, which is not what we want.

What I need to do, is store the REFERER value as it is when I enter the login.php page. To do this I can use the $_SESSION array.
But I must be carefull not to write the loging page in the SESSION if the REFERER value is the login.php, which could happen if there is a link to it somwhere.
So, my login.php page would start like this:

// Start a session
session_start();
 
// Make sure the REFERER value is
// not pointing to the login.php page.
if(strstr($_SESSION['HTTP_REFERER'], "login.php") == false)
{
  // Save the value in the $_SESSION array
  $_SESSION['beforeLogin'] = $_SERVER['HTTP_REFERER'];
}
 

Now, in the submit page, after I proccess the form data, I will have to redirect to the value saved in the $_SESSION array.
That might look something like this:

// Start session
session_start();
 
// Make sure the session variable is set.
// If it is not, the login page must not
// have had any value to save so we
// must redirect somewhere else.
if(!isset($_SESSION['beforeLogin']))
{
  // Redirect to some general place
  header("Location: http://mypage.com/home.php");
}
else
{
  // Lets get our variable
  $redirect = $_SESSION['beforeLogin'];
 
  // It is always good to unset session
  // variables when we stop using them.
  unset($_SESSION['beforeLogin']);
 
  // And now we redirect
  header("Location: ". $redirect);
}
 

I hope this clears it up a bit.

hi
thanks for reply
but it redirect me again in login page after login.
one thing i tell u i use function for it
and i have process page for it
please help me

[xiaawan]

Dear I viewed your problem yesterday. And I had a similar problem . I solved my problem using following function.

function getCurrentPageUrl()
{
$pageURL = 'http';

if ($_SERVER["HTTPS"] == "on")
{
$pageURL .= "s";
}

$pageURL .= "://";

if ($_SERVER["SERVER_PORT"] != "80")
{
$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
}
else
{
$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
$_SESSION['CURRENT_PAGE_URL'] = $pageURL;

}

Call this function to every page that can be redirected after login
And check at login code. If there is any value in the session your page will be redirected to the value stored in the session. I have implemented this function and its working fine. I hope it will work for you as well

if ($_SESSION['CURRENT_PAGE_URL'])
{
header('location: '.$_SESSION['CURRENT_PAGE_URL']);
}
else
{
//redirect to default url
}