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<?php function test() { $s = ""; $f = function($count) use (&$s) { if ($count <= 0) { return; } else { $s = $s."x"; $f($count-1); } }; $f(2); return $s; } echo test();
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $f in /in/IKYbZ on line 6 Fatal error: Uncaught Error: Value of type null is not callable in /in/IKYbZ:6 Stack trace: #0 /in/IKYbZ(8): {closure}(2) #1 /in/IKYbZ(12): test() #2 {main} thrown in /in/IKYbZ on line 6
Process exited with code 255.

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