using header function to redirect

Question

I'm new to programming in PHP. Kindly bear me...

when using header function, refresh option is not working when using variable from post method(dynamically). when hard-coded the number its working. I tried different options. You can see my whole code here.not succeeded to make refresh work dynamically. Can someone help?

<?php
if($_POST['time']>0) {
     $t = $_POST['time'];
     $u =$_POST['url'];
     echo "You will be redirected to the " .$u . " website in " .$t. "seconds";
     //header("refresh:5; url=http://www.google.com");

     //header("refresh:($_POST['time']);url=($_POST['url'])"); 
     header('refresh: ' .$t);
     header('Location: '.$u);
     exit;       
}
?>

score 1 · Answer 1 · answered Jun 25 '12 at 22:39

1

You have to call header() before any output like your echo statement. It simply will not work after anything has been output to the browser.

answered Jun 25 '12 at 22:39

Scott Saunders

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For once, that's not what the question is about. – mario Jun 25 '12 at 22:44

score 1 · Accepted Answer · answered Jun 25 '12 at 22:40

1

The Refresh header isn't just a number, it's supposed to contain the url as well. The format is:

Refresh: 5; url=http://something.local/

The Location header should be absent then.

header("Refresh: $t; url=$u");

See also http://en.wikipedia.org/wiki/HTTP_refresh

answered Jun 25 '12 at 22:40

mario

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0) { $t = $_POST['time']; $u =$_POST['url']; header("Refresh: $t; url=$u"); echo "You will be redirected to the " .$u . " website in " .$t. "seconds"; exit; } ?> – user1479431 Jun 25 '12 at 22:52

score 1 · Answer 3 · answered Jun 25 '12 at 22:41

1

You cannot call the php header function after any output has already been printed to the screen. If you remove that echo statement it should work properly.

answered Jun 25 '12 at 22:41

Matt Dodge

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score 0 · Answer 4 · answered Jun 25 '12 at 22:35

0

This is more reliably done with a JavaScript redirect:

echo "<p>You will be redirected in ".$t." seconds.</p>";
echo "<p>Click <a href=\"".$u."\">here</a> to go immediately.</p>";
echo "<script type=\"text/javascript\">setTimeout(function() {location.href = ".json_encode($u).";},".$t."000);</script>";

answered Jun 25 '12 at 22:35

Niet the Dark Absol

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Thanks Kolink. Javascript redirect seems pretty clear! But here I am restricted to do only in PHP. – user1479431 Jun 25 '12 at 22:39

score 0 · Answer 5 · answered Jun 25 '12 at 22:53

if ($_POST['time'] && $_POST['url'])
{
    $time = (integer)$_POST['time'];
    $url = strip_tags($_POST['url']);
    echo "You will be redirected to the " . $url . " website in " . $time . "seconds";
    header('Refresh:' . $time . ';url=' . $url);
}

using header function to redirect

5 Answers5