3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace A { class T {} } namespace { $hello = 42; class Test { public function first(string $str): Closure { return function() use ($str):int { return strlen($str); }; } public function second(int $i): int { } } $t = new Test; echo ($t->first("hello"))(); }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.7
5
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/2GLkG on line 11
Process exited with code 255.
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239.12 ms | 402 KiB | 328 Q