SERVER['REMOTE
Somehow $_SERVER['REMOTE_ADDR']
returns an empty string, i have the same code (as part of a script) running on multiple servers and it works everywhere else, they are all the same setup.
The weird thing is, when I restart apache and load the page, it works exactly once, if I reload the site + all the times after that, it's empty. I've had other people try, same result, empty.
someone suggested it was something with IPv6 configuration, I have now completely disabled IPv6 but the problem persists.
if you're behind a proxy server, you can use $_SERVER['HTTP_X_FORWARDED_FOR']
or $_SERVER['HTTP_CLIENT_IP']
instead of $_SERVER['REMOTE_ADDR']
. this will depends on how your proxy is configured.
Yes it's possible for REMOTE_ADDR to be empty. so if you want you can use this code that I use to get the ip based on HTTP_X_FORWARDED_FOR
<?php
if(! empty($_SERVER['REMOTE_ADDR']) ){
$ip = $_SERVER['REMOTE_ADDR'];
}
else{
$ip = empty($_SERVER['HTTP_X_FORWARDED_FOR']) ? '' : $_SERVER['HTTP_X_FORWARDED_FOR'];
}
I'm checking REMOTE_ADDR first as it is more reliable and sometimes HTTP_X_FORWARDED_FOR can be spoofed by users
I had code on a new VM that looked like this. It is being called from a javascript file:
<?php
$hostip = $_SERVER['REMOTE_ADDR'];
?>
var myip = "<?=$hostip ?>";
Worked on the old server of course and I was scratching my head for a while thinking there was something wrong with Apache..Was there a module missing? Some obscure Apache setting I can't find?. I thought Apache wasn't sending on the Server variables. That was until I tried the plain ol' fashioned way and it worked:
echo $_SERVER['REMOTE_ADDR'];
Turned out I had to edit php.ini and set short_open_tag to On . Facepalm - the shortcut php tags weren't working. Hopefully that will help save someone else a head of time :)
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