<? echo lalala; header(Location: http://www.google.com/); If i put this in a plain php file

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Asked: May 26, 20262026-05-26T11:02:09+00:00 2026-05-26T11:02:09+00:00

<? echo lalala; header(Location: http://www.google.com/); If i put this in a plain php file

0

<?
echo "lalala";
header("Location: http://www.google.com/");

If i put this in a plain php file and deliver over a standard apache2 server with mod-php (PHP Version 5.3.2-1ubuntu4.10) the redirect to google works.

<?
echo "lalala";
flush();
header("Location: http://www.google.com/");

this code does obviously not produce a working redirect.

My question is how the first code is beeing processed and why it works. Because I remember times when things like this were not possible. Is mod-php or apache intelligent enough to buffer the whole request and arrange headers before content?

And:

Can I rely on this if I make sure I don’t flush the output manually? Because it would make my application much easier…