Online PHP editor | output for h0q4u

@ 2013-07-23T21:14:47Z

<?php
// Everything you enter here will be executed by our servers. Try it!

$factorial = call_user_func(
    function ($le) {
        return call_user_func(
            function ($f) {
                return $f($f);
            },
            function ($f) use ($le) {
                return $le(function ($x) use ($f) {
                    return call_user_func($f($f), $x);
                });
            }
        );
    },
    function ($factorial) {
        return function ($x) use ($factorial) {
            if ($x > 0) {
                return $x * $factorial($x - 1);
            }
            return 1;
        };
    }
);
 
var_dump($factorial(1));
var_dump($factorial(2));
var_dump($factorial(3));
var_dump($factorial(4));

Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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: int(1) int(2) int(6) int(24)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/h0q4u on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/h0q4u on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/h0q4u on line 5
Process exited with code 255.

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