指定某列的值为分组

//分组函数
   function array_val_chunk($array,$chunkCol){
      $resultchunk = array();
      foreach ($array as $key => $value) {
          $resultchunk[$value[$chunkCol]][] = $value;
      }
      $retchunk = array();
      foreach ($resultchunk as $key => $value) {
          array_push($retchunk, $value);
      }
      return $retchunk;

  }