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<?php $r = range(1,10); array_map(function(&$value, $key) { $double = $value*2; if ($double >= 12) { $value = $double; } else { unset($r[$key]); } }, $r); var_dump($r);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Xsjtf on line 5 Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/Xsjtf:5 Stack trace: #0 [internal function]: {closure}(1) #1 /in/Xsjtf(5): array_map(Object(Closure), Array) #2 {main} thrown in /in/Xsjtf on line 5
Process exited with code 255.

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