Best way to get hostname with php
PhpPhp Problem Overview
I have a php application that is installed on several servers and all of our developers laptops. I need a fast and reliable way to get the server's hostname or some other unique and reliable system identifier. Here's what we have thought of so far:
<? $hostname = (!empty($_ENV["HOSTNAME"])) ? $_ENV["HOSTNAME"] : env('HOSTNAME'); ?>
<? $hostname = gethostbyaddr($_SERVER['SERVER_ADDR']); ?>
<? $hostname = exec('hostname'); ?>
What do you think?
Php Solutions
Solution 1 - Php
What about gethostname()?
Edit: This might not be an option I suppose, depending on your environment. It's new in PHP 5.3. php_uname('n') might work as an alternative.
Solution 2 - Php
$hostname = gethostname();
For PHP < 5.3.0 but >= 4.2.0 use this:
$hostname = php_uname('n');
For PHP < 4.2.0 use this:
$hostname = getenv('HOSTNAME');
if(!$hostname) $hostname = trim(`hostname`);
if(!$hostname) $hostname = exec('echo $HOSTNAME');
if(!$hostname) $hostname = preg_replace('#^\w+\s+(\w+).*$#', '$1', exec('uname -a'));
Solution 3 - Php
You could also use...
$hostname = getenv('HTTP_HOST');
Solution 4 - Php
I am running PHP version 5.4 on shared hosting and both of these both successfully return the same results:
php_uname('n');
gethostname();
Solution 5 - Php
The accepted answer gethostname() may infact give you inaccurate value as in my case
gethostname() = my-macbook-pro (incorrect)
$_SERVER['host_name'] = mysite.git (correct)
The value from gethostname() is obvsiously wrong. Be careful with it.
Update as corrected by the comment
Host name gives you computer name, not website name, my bad. My result on local machine is
gethostname() = my-macbook-pro (which is my machine name)
$_SERVER['host_name'] = mysite.git (which is my website name)
Solution 6 - Php
php_uname but I am not sure what hostname you want the hostname of the client or server.
plus you should use cookie based approach