将查询结果传递给另一个类

当我在类a中进行查询时，我已经得到了所有数据。类B需要使用一些数据。我更喜欢将查询结果的一部分传递给B，而不是在B中进行新的查询。类B将执行一些作业，数据将在类B中更改。如何将数组$something_else传递给类B？以下是课程：

class A{
  public $something;
  private $_project_obj;
  function __construct( $id = null ){
    if ( $id ) {
       $this->id = $id;
       $this->populate( $this->id );
    }
}
 function populate(){
      $query = //do query
      $this->somthing= $query['A'];
      $this->something_else = $query['B'];
}
 function save(){
     // call save() in class B, $something_else is saved there
     if ( $this->_project_obj instanceof B ) {
    if ( true !== $this->_project_obj->save() ) {
        return false;
    }
    }
    // save $something and other stuffs in class A
   //  ......
   }
  function project() {  
    if ( !$this->_project_obj instanceof B ) {
     if ( ( $this->id ) && ( loggedin_user_id() ) ) {
       $this->_project_obj = new B( $this->id, loggedin_user_id() );
    } else {
    return false;
    }
    }
     return $this->_project_obj
    }
}
class B{
  public $data_this;
  public $data_that;
  function __constructor( $id=null, $user_id=null){
      if($id && $user_id){
        return $this->populate();
      }
      return true;
  }
 function populate(){
  $query = // do the same query as in class A
  $something_else = $query['B'];
  $this->data_this = $something_else['a'];
  $this->data_that = $something_else['b'];
 }
 function save(){
  // save all data as $something_else 
 }
 function jobs(){
 // perform jobs
 }
}