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<?php usort($a=[1, 4, 5, 3, 2], function($a, $b) { return $a > $b ; }); print_r($a);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: usort(): Argument #1 ($array) cannot be passed by reference in /in/WFCXM:3 Stack trace: #0 {main} thrown in /in/WFCXM on line 3
Process exited with code 255.

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