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");

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29.35 ms | 402 KiB | 5 Q