3v4l.org

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<?php $array = array(1,2,3,4,5,6,7,8,9); usort($array, function ($a, $b) { return false; }); echo pack("L*", openssl_random_pseudo_bytes(1));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: usort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/DQbSC on line 4 Fatal error: Uncaught Error: Call to undefined function openssl_random_pseudo_bytes() in /in/DQbSC:7 Stack trace: #0 {main} thrown in /in/DQbSC on line 7
Process exited with code 255.

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