How can you combine two arrays?

Question

They are simplified as follows which is enough for this question. This question is based on this answer.

1

[a][b][]

and

2

Answer 1

for($i = 0; $i < sizeof($array); $i++)
{
     $mergedarray[a][b] = $a[a][b];
     $mergedarray[a][c] = $b[a][c];
}

as far as i can tell this is what you want, that way both the sub-keys have the same root key.