How to merge all elements of subarrays into one array

Question

Here is the array itself:

0 => [ 0 => int 904 1 => int 928 2 => int 937], 1 => [ 0 => int 351 1 => int 352 2 => int 353], 2 => [ 0 => int 903 1 => int 972 2 => int 974]

I need to get this:

 [0 => int 904 1 => int 928 2 => int 937 3 => int 351 4 => int 352 5 => int 353 6 => int 903 7 => int 972 8 => int 974]

Can this be done somehow without foreach ?

user207618 · Accepted Answer · 2016-10-27T18:27:18

Use the array_reduce function, Luke!
Like that:

 $fArr = [[904,928,937], [351,352,353], [903,972,974]]; var_dump(array_reduce($fArr, function($acc, $item){return array_merge($acc, $item);}, []));

@Naumov, brute force will be in any case, but there is a difference between brute force on the compiled function and brute force banging with its construction.

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