PHP Forum

**J0ker** · 12-23-2007, 01:40 PM

You need to redirect somewhere in your script but it has to be after the headers have been sent, happens all the time right? Use a javascript redirect.

Just put this wherever the redirect needs to be, such as in a IF statement, etc:

PHP Code:


			
?>
<script type="text/javascript">
window.location.href='URLHERE';
</script>
<?php

**rogem002** · 12-23-2007, 05:22 PM

The only problem with this is if the user has Javascript turned off

Useful mind

**lizciz** · 12-23-2007, 06:43 PM

Another solution, using only php, would be to use output bufferts (functions starting with ob_, such as ob_start()), where all contents is stored as a buffert instead of being sent to the browser. Then you can still use functions such as header(). If no redirect is nessesary you simply retrieve the buffert and output the contents to the browser.

**J0ker** · 12-23-2007, 11:43 PM

Thats cool, can you give me a quick example?

**lizciz** · 12-24-2007, 05:58 AM

PHP Code:


			
<?php

ob_start();

?>
<html>
<head>
<title>My Website</title>
</head>
<body>
Some content...
</body>
</html>
<?php

if(noErrors()) {
    ob_end_flush(); // 'Flushes' the buffer (outputs to browser)
} else {
    header("Location: error.php");
}

?>

You can also call a callback function before flushing, which lets you edit the content before outputting it. Here's an example from directly from php.net
(you can read more about it there).

PHP Code:


			
  <?php

function callback($buffer)
{
  // replace all the apples with oranges
  return (str_replace("apples", "oranges", $buffer));
}

ob_start("callback");

?>
<html>
<body>
<p>It's like comparing apples to oranges.</p>
</body>
</html>
<?php

ob_end_flush();

?>

</span> </span> </div> </div>

**J0ker** · 12-24-2007, 01:20 PM

I see but that can't work in my case because I am using a template system and the headers start in the header.tpl so any thing in the php files will always be after that.

**lizciz** · 12-24-2007, 08:27 PM

Then just put

PHP Code:


			
<?php ob_start(); ?>

first in your header file, or before you include the header file.

**rogem002** · 12-25-2007, 06:17 PM

Wow, that is a good way

But in general I think it's a good rule of thumb to not send any html before you know what to send to a page

That ob thing is nice!

PHP Code:


			
<?php 
ob_start(); 

// Code here \\

ob_end_flush();
?>

You could also use a meta refresh, but only in the <head> tags.