Online PHP editor | output for GiNEm

@ 2014-09-12T17:48:35Z

<?php

function uuid($c = 4) {
    $x = function($c) {
        for ($n = ''; strlen($n) < $c + 1; $n = $n.mt_rand());
        return substr($n, -$c);
    };
    return sprintf(
        '%s-%04d-%04d-%04d-%04d%04d',
        microtime(), $x($c), $x($c), $x($c), $x($c), $x($c), $x($c)
    );
}

$time = microtime();
$uuids = array();
for ($i = 0; $i < 10000; $i++) {
	$uuids[] = uuid();
}

if (count(array_unique($uuids)) != count($uuids)) {
	echo 'DUPLICATE';
} else {
	echo 'No duplicate';
}

Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7: No duplicate
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 in /in/GiNEm on line 4
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 in /in/GiNEm on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/GiNEm on line 4
Process exited with code 255.

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