（转载）php 合并数组中的数据,如果键值相等其值相加

（转载）http://hi.baidu.com/syxrrrr/item/7dfb2387343ce0874414cfdd

/*
* 合并数据，如果键值相等其值相加
* @param array $descs
* @param array $json_wares
*/
public static function getArrayMerge($descs, $json_wares)
{
   if (is_array($descs) && is_array($json_wares)) {
    $arrayMerge = array();
    foreach ($json_wares as $key=>$value) {
     if (array_key_exists($key, $descs)) {
      $arrayMerge[$key] = $value + $descs[$key];
      unset($descs[$key]);
     } else {
      $arrayMerge[$key] = $value;
     }
    }
    return $arrayMerge+$descs;
   } else {
    return false;
   }
}