3v4l.org

run code in 500+ PHP versions simultaneously
<?php class foo { function bar(callable $callable) { $callable($this); } function printStr() { echo "hi"; } } $foo = new foo(); $foo->bar(function ($that) { $that->printStr(); // Using $this when not in object context });
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.6
hi

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66.77 ms | 975 KiB | 4 Q