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<?php $array = [[1,2,3,4],[5,6,7,8],[9,0,1,2],[3,4,5,6]]; var_export(array_map(null, ...$array));
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.21, 7.4.0 - 7.4.9, 8.0.0alpha1 - beta1
array ( 0 => array ( 0 => 1, 1 => 5, 2 => 9, 3 => 3, ), 1 => array ( 0 => 2, 1 => 6, 2 => 0, 3 => 4, ), 2 => array ( 0 => 3, 1 => 7, 2 => 1, 3 => 5, ), 3 => array ( 0 => 4, 1 => 8, 2 => 2, 3 => 6, ), )