Merge multiple arrays from one array

Question

How to merge multiple arrays from a single array variable ? lets say i have this in one array variable

Those are in one variable ..
$array

Answer 1

array_merge can do the job

$array_meged = array_merge($a, $b);

after the comment

If fixed indexs you can use:

$array_meged = array_merge($a[0], $a[1]);

A more generic solution:

$array_meged=array();
  foreach($a as $child){
  $array_meged += $child;
}