Question

当我在A类中进行查询时，我已经获得了所有数据。 B类需要使用一些数据。我更喜欢将部分查询结果传递给B，而不是在B中执行新查询.B类将执行一些作业，数据将在B类中更改。如何将数组$ something_else 传递给类B'这是课程：

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
 }
}

Answer 1

class class_b
{

public $something_else = NULL

}

$a = new class_a();
$b = new class_b();

$b->something_else = $a->something_else

Answer 2

不清楚B中的 where 你需要something_else，所以让我们把它作为构造函数的一部分添加：让构造函数接受{{1}的附加参数并将其保存到该类'property：

something_else

当A创建B：class B{ private var $_parent; function __constructor( $parent, $id=null, $user_id=null){ $this->_parent = $parent; // Save reference to the "A" that contains this "B" if($id && $user_id){ return $this->populate(); } return true; }

时

当B需要从其父级A $this->_project_obj = new B( $this, $this->id, loggedin_user_id() );

获取最新版本的something_else时

将查询结果传递给另一个类

2 个答案: