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<?php $string = 'This is a string!'; $i = 0; var_dump(implode('', array_map(str_split($string), function($val, $key) { return ($key % 2 ? $val : null); })));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, array callback must have exactly two members in /in/eHQbZ:5 Stack trace: #0 /in/eHQbZ(5): array_map(Array, Object(Closure)) #1 {main} thrown in /in/eHQbZ on line 5
Process exited with code 255.

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