3v4l.org

run code in 500+ PHP versions simultaneously
<?php $closure = function($a, $b) {}; echo (string) new ReflectionFunction($closure);
Output for 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Closure [ <user> function {closure:/in/5eYonp:3} ] { @@ /in/5eYonp 3 - 3 - Parameters [2] { Parameter #0 [ <required> $a ] Parameter #1 [ <required> $b ] } }
Output for 8.3.0 - 8.3.30
Closure [ <user> function {closure} ] { @@ /in/5eYonp 3 - 3 - Parameters [2] { Parameter #0 [ <required> $a ] Parameter #1 [ <required> $b ] } }

preferences:
41.63 ms | 707 KiB | 4 Q