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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = uniqid(); function getNumber($val) { $lets = array(); foreach (range('a', 'z') as $let) { $lets[] = ("'`" . $let . "`is'"); } $num = range(1, 26); $val = strtolower($val); die(preg_replace('`asda`is', 123, 'this bullasda')); $ret = preg_replace($lets, $num, $val); $ret = substr($ret, 0, 10); return $ret; } $b = getNumber($a); echo "<pre>"; var_dump($b);
Output for 5.0.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
this bull123
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.4.9
Warning: uniqid() expects at least 1 parameter, 0 given in /in/lc5NZ on line 2 this bull123