Is there better way to transpose a PHP 2D array?

Question

According to the PHP Manual, calling array_map with a NULL callback causes it to perform a \"zip\" function, creating an array of arrays of paralle

Answer 1

If you really want to avoid the array_merge, use array_unshift to prepend the NULL to the $array_of_arrays instead:

array_unshift($array_of_arrays, NULL);
call_user_func_array('array_map', $array_of_arrays);

Of course it is not a one-liner anymore :P