3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ['foo'=>'bar']; //PHP5 style $message = isset($array['foo']) ? $array['foo'] : 'not set'; echo $message.PHP_EOL; //PHP7 style $message = $array['foo'] ?? 'not set'; echo $message.PHP_EOL;
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
bar bar

preferences:
155.44 ms | 403 KiB | 166 Q