html link with php header() redirection

Question

when I am redirecting with "a href .." to another page I lose all my SESSION variables. So I want to redirect only by using header() php function. How I can create a link that when the user use it redirects him to another page using header()? Thank you

here is my code: source page:

session_save_path("myrootdir/cgi-bin/tmp");
session_start();
....
$id = $_SESSION['id']; //session variable passed succesfully from log in page
$usr = $_SESSION['usr'];//by using header('sourcepage.php');
....
< a href='http://targetpage.php'>target< / a>

target page:

session_save_path("myrootdir/cgi-bin/tmp");
session_start();
...
if(isset($_SESSION['id']) && isset($_SESSION['usr'])) {
   echo "success";
}
else{
   echo "failed to pass";
}

I always get failed to pass!

UPDATE

now I have another strange issue...

$_SESSION['id']=$_POST['id'];
$_SESSION['usr']=$_POST['usr'];

if(isset($_SESSION['id']) && isset($_SESSION['usr'])) {
    $id = $_SESSION['id'];
    $usr = $_SESSION['usr'];
    $qry = mysql_query("SELECT * FROM members WHERE id = '". mysql_real_escape_string( $id ) ."' AND usr = '". mysql_real_escape_string( $usr ) ."'");
    echo "Welcome ".$usr;
    echo "Session id".session_id();
    if(mysql_num_rows($qry) != 1) { Destroy(); }
  } else { Destroy(); }

when I check if someone is logged in like this it works perfect in every page but when I remove the echo lines then it calls Destroy() function.

using header redirection I dont have any problem. By using html href redirection I lose all my SESSION vars. You mean I have to call exit() inside href ? — Aggelos SunDance Troulakis
– Aggelos SunDance Troulakis, Commented Aug 1, 2013 at 11:59
the header('sourcepage.php') is in the log in page which redirects to the sourcepage.php with the session variables succesfully — Aggelos SunDance Troulakis
– Aggelos SunDance Troulakis, Commented Aug 1, 2013 at 13:51

Braggae · Accepted Answer · 2013-08-01 15:59:47Z

1

This method works only if you call "header" before any output to browser, including tags. So I supose it not the best idea to use "header".

If you losing SESSION variables, try to add some JavaScript that will create form whith vars you need inside inputs, and submit it to new page.

Is this redirection inside one domain?

UPDATE:

php code on current page:

echo '<input type="text" id="sessionID" style="display: none;" value="'.$_SESSION['id'].'">';
echo '<input type="text" id="sessionUri" style="display: none;" value="'.$_SESSION['usr'].'">';

JS code:

< a onclick="sendSessionVars()">target< / a>

<script>
    function sendSessionVars(){
        var body=document.getElementsByTagName('body')[0];
        var sessionId=document.getElementById('sessionID').value;
        var sessionUri=document.getElementById('sessionUri').value;
        var form=document.createElement('form');
        form.setAttribute('method','post');
        form.setAttribute('style','display:none');
        form.setAttribute('action','targetpage.php');
        body.appendChild(form);
        var id=document.createElement('input');
        id.setAttribute('type','hidden');
        id.setAttribute('name','id');
        id.setAttribute('value',sessionId);
        var usr=document.createElement('input');
        usr.setAttribute('type','hidden');
        usr.setAttribute('name','usr');
        usr.setAttribute('value',sessionUri);
        form.appendChild(id);
        form.appendChild(usr);
        form.submit();  
    }
</script>

on jQuery would be much less code, but it will work slower.

and php code on target page:

$_SESSION['id']=$_POST['id'];
$_SESSION['usr']=$_POST['usr'];

You can also post it to some vars. It's pretty straightforward way.

But you should not lose SESSION variables. Check is your session_start(); is ok.

edited Aug 1, 2013 at 15:59

answered Aug 1, 2013 at 12:14

Braggae

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2 Comments

Aggelos SunDance Troulakis Over a year ago

yes its inside the same domain. I use < a href='mysite.com/page1.php > page1 < /a > . Can you give me an example in javascript to pass the $_SESSION['usr'] and $_SESSION['id'] vars to the new page?

Aggelos SunDance Troulakis Over a year ago

it worked! thank you! but I have a strange issue now! please check update in main question

Adnan Ahmed · Accepted Answer · 2013-08-01 11:57:33Z

1

header("Location: yourpage.php") try this

answered Aug 1, 2013 at 11:57

Adnan Ahmed

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1 Comment

Aggelos SunDance Troulakis Over a year ago

I want to have a link on my page so when the user clicks it the redirects him using header()

Narwen · Accepted Answer · 2013-08-01 12:12:30Z

0

In php use it header('Location:page_name.php') But I prefer to use javascript cause you might headers problem using it alot So here is my javascript

       echo "<script>window.location='page.php'</script>";

answered Aug 1, 2013 at 12:12

Narwen

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Comments

Anonymous · Accepted Answer · 2013-08-01 12:26:40Z

0

use header("Location:some.php")

and putting header redirect before html tag is a good practice. You might want to reconstruct your website structure, if you find that it is below the html tag.

answered Aug 1, 2013 at 12:26

Anonymous

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