<?php
class A{
  public $p1 = 1;
  protected $p2 = 2;
  private $p3 = 3;
  static $p4 = 4;
}
$obj1 = new A();
foreach($obj1 as $key => $value){//$key表示对象的属性，$value是其对应的值
  echo "<br />属性$key ：" . $value;
}
?>
 

<?php
class A{
  public $p1 = 1;
  protected $p2 = 2;
  private $p3 = 3;
  static $p4 = 4;  //静态属性
  function showAllProperties(){
    foreach($this as $key => $value){
      echo "<br />属性$key ：$value";
    }
  }
}
$obj1 = new A();
$obj1->showAllProperties();
?>