There are times where you need to redirect the user to another
page. For example, after the user has successfully registered as a user at your
site, you might want to redirect them to the login page. As such, you need to
be able to programmatically redirect the user to the target page.
To redirect the user to another page using PHP, you can use the header() function, like this:
<?php
header('Location: anotherpage.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML
4.01//EN"
This snippet of code must be placed at the top of the document,
before the DOCTYPE element. The above code will automatically redirect the user
to anotherpage.php whenever the user loads it.
However, if you want to programmatically redirect the user based
on certain conditions (such as user successfully registering at your site), you
have to do a little more work. The following code snippet redirects the user
after injecting a delay of five seconds:
//--redirect to another page---
$delay = 5; //---five
seconds---
$redirectPageUrl = "login.php";
header( "Refresh: $delay; url=$redirectPageUrl" );
echo "You will now be redirected to the login page, after
$delay seconds.";
exit();
The above snippet of code will redirect the user to the login.php
page. Be aware though, that the above snippet must be accompanied by the
following snippet, placed at the top of your PHP page:
<?php
ob_start();
?>
The ob_start()
function turns the output buffer on so that no HTML code is sent to the client
until the entire PHP script has been processed. If you don’t do that, by the
time the header() function performs
a redirection it would be too late as HTML code has already been sent to the
client.
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