Merge and group by several arrays

Question

I need to merge associative arrays and group by the name. Say I have such 3 arrays:

ARRAY1
    \"/path/file.jpg\"  =>  2, 
    \"/path/file2.bmp\" =>  1,
          


        

Answer 1

[EDIT: I adapted the function (as suggested by John Green) to use func_get_args so you don't need to put all the seperate arrays in one array before you can use it.]

I think you could use the following function.

mergeArrays()
{
    $return = array();
    $arrays = func_get_args();
    foreach ($arrays as $array) {
        foreach ($array as $key => $val) {
            if (array_key_exists($key, $array) {
                $return[$key] += $val;
            } else {
                $return[$key] = $val;
            }
        }
    }
    return $return;
}