<?php $arr = ['Hello world']; var_dump($arr[false]); if (0 == false) { echo "0 double equals false\n"; } $arr2 = [ 0 => 'Excuse me', 1 => 'What the fuck', false => 'NotLikeThis', true => 'ButWhyTho', 'Moo' => "I'm a cow.", '' => 'wtf', null => 'wat.', ]; var_dump($arr2);