Online PHP editor | output for GeFd6

@ 2014-10-16T09:53:51Z

<?php

error_reporting(E_ALL);

$data = '<?xml version="1.0" encoding="UTF-8"?><result><status>0</status><error>FATAL_ERROR</error></result>';
            if (((isset($data['result']['result']['status']) && $data['result']['result']['status'])                || (isset($data['result']['result']['STATUS']) && $data['result']['result']['STATUS']))            ) {                $response = $data['result'];            }

var_dump($response);

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined variable $response in /in/GeFd6 on line 8 NULL
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33: Notice: Undefined variable: response in /in/GeFd6 on line 8 NULL
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Fatal error: Cannot use string offset as an array in /in/GeFd6 on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9: Notice: Undefined variable: response in /in/GeFd6 on line 8 NULL

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