WhatTheFuck.php

<?php

class Test
{
    public function whatTheFuck()
    {
        ${'thi' . 's'} = 'tata';
        $name = 'this';

        var_dump($this);
        var_dump($$name);

        var_dump($this->getThis());

        var_dump($$name->getThis()); // Fatal error!
    }

    public function getThis()
    {
        return $this;
    }
}

$t = new Test();
$t->whatTheFuck();