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<?php $string = 'This is a string!'; var_dump(array_filter(str_split($string), function($val, $key) { return $key % 2; }));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/IvDdC:4 Stack trace: #0 [internal function]: {closure}('T') #1 /in/IvDdC(4): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/IvDdC on line 4
Process exited with code 255.

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