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<?php $sum; // global variable function outer() { $hundred_more = 100; $sum = function ($a, $b) { return $a + $b + (++$hundred_more); }; echo $hundred_more; } outer(); // define sum at the global scope and print 100 echo($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
100 Warning: Undefined variable $sum in /in/m8Vf5 on line 13 Fatal error: Uncaught Error: Value of type null is not callable in /in/m8Vf5:13 Stack trace: #0 {main} thrown in /in/m8Vf5 on line 13
Process exited with code 255.

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