3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; define('Foo\\null', \true); define('Foo\\true', \false); define('Foo\\false', \true); echo "null" . (null ? "1" : "0"); echo "true" . (true ? "1" : "0"); echo "false" . (false ? "1" : "0");
Output for 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
null0true1false0
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
null1true0false1
preferences:
197.22 ms | 402 KiB | 227 Q