A related problem with foreach in PHP

A problem with foreach in PHP

$list = Array (
            Array (' id ' = = 1, ' count ' = 1),
            Array (' id ' = = 1, ' count ' = 2),
            Array (' id ' = = 2, ' count ' = 2),
            Array (' id ' = = 3, ' count ' = 3),
            Array (' id ' = = 3, ' count ' = + 4)
        );
        $sort = Array ();
        foreach ($list as $v)
        {
            $sort [] = $v [' id '];
        }
        $sort = Array_unique ($sort);
        $new = Array ();
        foreach ($sort as $v 1)
        {
            $c = 0;
            foreach ($list as $v 2)
            {
                if ($v 1 = = $v 2[' id '])
                {
                    $c + = $v 2[' count '];
                }
            }
            $new [] = array (' id ' = = $v 1, ' count ' = $c);
        }

This is now the practice of seeking a simpler and more reasonable approach!!
Requirement: Existing array: $list, the result needed: Merge the field count for the duplicate ID in the array. As the above result array $new

------to solve the idea----------------------

$list = Array (
            Array (' id ' = = 1, ' count ' = 1),
            Array (' id ' = = 1, ' count ' = 2),
            Array (' id ' = = 2, ' count ' = 2),
            Array (' id ' = = 3, ' count ' = 3),
            Array (' id ' = = 3, ' count ' = + 4)
        );

Perform calculations
$tmp = Array ();

foreach ($list as $val) {
    if (Isset ($tmp [$val [' ID ']]) {
        $tmp [$val [' ID ']] + = $val [' count '];
    }else{
        $tmp [$val [' id ']] = $val [' count '];
    }
}

Ksort ($TMP); Sort by key

$new = Array ();
foreach ($tmp as $k = = $v) {
    Array_push ($new, array (' id ' = $k, ' count ' = $v));
}

Print_r ($new);

------to solve the idea----------------------

$list = Array (
  Array (' id ' = = 1, ' count ' = 1),
  Array (' id ' = = 1, ' count ' = 2),
  Array (' id ' = = 2, ' count ' = 2),
  Array (' id ' = = 3, ' count ' = 3),
  Array (' id ' = = 3, ' count ' = + 4)
);
$new = Array ();
foreach ($list as $r) {
  if (! isset ($new [$r [' ID ']]) $new [$r [' id ']] = $r;
  else $new [$r [' id ']][' count '] + = $r [' count '];
}
$new = Array_values ($new);
Print_r ($new);

Array
(
    [0] = = Array
        (
            [id] = 1
            [Count] = 3
        )

    [1] = = Array
        (
            [id] = 2
            [Count] = 2
        )

    [2] = = Array
        (
            [id] = 3
            [Count] = 7
        )

)

