CODEWITHSUNDEEP
http-redirectphp-7php-7.2
Alex028502
Alex028502

Reputation: 3814

php location header redirect works even after output has started

I thought you couldn't redirect using header('location:.. in php if you had already sent some output. However, this test program works as (un)expected with the local server.

$ cat > index.php
Hello,
<?php

if ($_SERVER['REQUEST_URI'] !== "/") {
  header('location: /');
  die();
}

?>
World!

and then I start the php local server like this

$ php -S localhost:8000

and then when I go to http://localhost:8000/index.php?test=1 it redirects me to http://localhost:8000.

Why isn't it complaining that I have already sent output? is it something different about php 7? Something different about modern browsers? Something different about the demo server? Or do I need to do something slightly different to get the error I got last time I used php?

Upvotes: 1

Views: 39

Answers (1)

iquito
iquito

Reputation: 2555

I tried your script, and for me it reported back the expected "Cannot modify header" warning and only displayed "Hello,".

The main thing that could be different for you is the output_buffering variable in your php.ini - if it is not disabled, then it automatically buffers the output up to a certain size. So check if it is set to either "On" or something like 4096. The default value if Off, but there are a lot of sample configs where it is enabled.

Upvotes: 1

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