PHP - How to merge arrays inside array

Question

How to merge n number of array in php. I mean how can I do the job like :
array_merge(from : $result[0], to : $result[count($result)-1])
OR<

Answer 1

Try this

$result = array_merge($array1, $array2);

Or, instead of array_merge, you can use the + op which performs a union:

$array2 + array_fill_keys($array1, '');