Useful Information about Function Header (PHP)

[Drunken]

heya!


For a long time I have many problems with function Header in PHP. This cause an error of outup buffering when we have something like this:


<?php
echo "Hi world!";
header ("location: main.php");
?>



this cause a error that i refer previous. The first solution for this was using javascript like this:



echo "<SCRIPT>window.location=\"main.php\"; </SCRIPT>";


but this isn't very good because when user click back on browser isn't possible, this function not permit Back.

Then I have to found another solution :m: , finally :geek:
like this:



<?php
ob_start();

echo "Hi world!";
header ("location: main.php");

ob_end_flush();
?>


Using this functions (ob_start(); and ob_end_flush(); ), we can have many outputing to buffer without cause error :)

You can found more information about this functions in
www.php.net (http://www.php.net)

I test this in PHP 4.0.6 and 4.3.1

I hope this help someone :azn:
xauz!

[Jubba]

well if you are going to do that, then why not just take the output code (echo) out. The ob_start disallows output being displayed... so that entire code could be shortened to



<?
header("Location: whereever.php");
?>

[λ]

here is a good article about this (http://www.devshed.com/Server_Side/PHP/OutputBuffering/page1.html)

[Drunken]

Jubba can be but if you need to have something like this



<?php

if ($status == "loginok") {

echo "Validation Ok!"

}else {


header ("location: main.php");
}

?>


you can't have only header ("location: main.php");

(-:

[Jubba]

look at your code again. That would work without using the ob_start/ob_flush because of the if statement. If its not true then there is no output and the header gets parsed... if the statement is true... the output is run and the header doesn't get parsed...

[Drunken]

No... don't works .... the logical is that work but not ...

As i was sad, i test in versions 4.0.6 and 4.3.1 ...

[Jubba]

works fine on: 4.3.2

must be the older versions... but I never had trouble with this before I upgraded my server...

eh whatever...

[DigitalPimp]

Doesn't PHP have HTTP Headers like ASP?

[Jubba]

http://us4.php.net/manual/en/function.header.php