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<?php function g($al = null, $go = null) { $goal = function($al = null, $go = null) use (&$goal) { if (!isset($go)) $go = 'go'; else $go .= 'o'; if (!isset($al)) return function ($al) use (&$go) { return $goal($al, $go); }; return $go.$al; }; return $goal($al, $go); } echo $goal()('al');
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $goal in /in/Y6bgu on line 15 Fatal error: Uncaught Error: Value of type null is not callable in /in/Y6bgu:15 Stack trace: #0 {main} thrown in /in/Y6bgu on line 15
Process exited with code 255.

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