No consider same keys, only join an array to another.
Array(0 => 'aaa', 1 => 'bbb');
Array(1 => 'ccc', 2 => 'ddd');
I hope the result:
Array(0 => 'aaa', 1 => 'bbb', 2 => 'ccc', 3 => 'ddd');
I do not want to write a function to join them. Is there any PHP function available for it?