PHP- how to sum array elements with duplicate element value

I have a multi array that has some duplicated values that are same by name ( name is an element )
i want to sum quantity of each array that has same name , and then unset the second array
Example :

<?php 
 $Array=array(
  0=>array("name"=>"X","QTY"=>500),
  1=>array("name"=>"y","QTY"=>250),
  2=>array("name"=>"X","QTY"=>250)
 );
?>

Now i want to sum duplicated values as below.
Result :

<?php 
 $Array=array(
  0=>array("name"=>"X","QTY"=>750),
  1=>array("name"=>"y","QTY"=>250)
 );
?>

UPDATED
i found this function to search in array , foreach and another loops does not works too

<?php
function search($array, $key, $value)
{
    $results = array();

    if (is_array($array)) {
        if (isset($array[$key]) && $array[$key] == $value) {
            $results[] = $array;
        }

        foreach ($array as $subarray) {
            $results = array_merge($results, search($subarray, $key, $value));
        }
    }

    return $results;
}
?>