3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(callable $bar) { } foo(function() {}); foo('strpos'); foo('foo'); foo(array(new SplFixedArray(), 'fromArray')); foo(array('SplFixedArray', 'fromArray')); foo('SplFixedArray::fromArray');
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.14
preferences:
58.58 ms | 408 KiB | 5 Q