php Remove parent level array from set of arrays and merge nodes

Question

I am terrible with manipulating arrays...given this structure I want to remove the top level array and merge all subsets into one flat array:

Array
(
    [0]         


        

Answer 1

If the values are always at the same level of depth you could indeed use array_merge:

$array = [                                                                                                                                                                                                                                 
    [
        ['hey.com'],
        ['you.com'],
    ],                                                                                                                                                                                                                
    [
        ['this.com'],
        ['rocks.com'],
    ],                                                                                                                                                                                                             
];

print_r(array_merge(... array_merge(... $array)));

Getting:

Array
(
    [0] => hey.com
    [1] => you.com
    [2] => this.com
    [3] => rocks.com
)