3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$host = 'blub'; if ($host) { $configFileName = APP_PATH . '/vendor/config/config.' . $host . '.php'; } var_dump($host, $configFileName, !isset($configFileName));
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 $host in /in/XiWf0 on line 4 Warning: Undefined variable $host in /in/XiWf0 on line 7 Warning: Undefined variable $configFileName in /in/XiWf0 on line 7 NULL NULL bool(true)
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: host in /in/XiWf0 on line 4 Notice: Undefined variable: host in /in/XiWf0 on line 7 Notice: Undefined variable: configFileName in /in/XiWf0 on line 7 NULL NULL bool(true)
Output for 7.3.32 - 7.3.33, 7.4.26
NULL NULL bool(true)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: host in /in/XiWf0 on line 4 Notice: Undefined variable: host in /in/XiWf0 on line 7 Notice: Undefined variable: configFileName in /in/XiWf0 on line 7 NULL NULL bool(true)

preferences:
252.4 ms | 402 KiB | 457 Q