- var_dump: documentation ( source)
<?php
$_SERVER['HTTP_HOST'] = '192.168.56.1:3002';
$a = $_SERVER['HTTP_HOST'];
$b = 'vagrant.khanovaskola.cz';
$c = 'vagrant.khanovaskola.cz_foo';
$d = 'foo_vagrant.khanovaskola.cz';
var_dump($a, $b, $c, $d);
var_dump($a === $b);