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<?php $sum = null; // global variable function outer() { global $sum; $hundred_more = 100; $sum = function ($a, $b) use ($hundred_more) { return $a + $b + (++$hundred_more); }; println($hundred_more); } outer(); // define sum at the global scope and print 100 echo($sum(5, 10)); // 116 echo($sum(5, 10)); // 117 outer(); // redefine sum at the global scope and print 100 echo($sum(5, 10)); // 116 echo($sum(5, 10)); // 117
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function println() in /in/vK2R2:11 Stack trace: #0 /in/vK2R2(13): outer() #1 {main} thrown in /in/vK2R2 on line 11
Process exited with code 255.

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