1 <?php 2  3 class order{ 4     //无set get 暂不分装结构体; 5      public $a; 6      public $b; 7      public $c; 8 } 9 10 /**11 * Iterator模式的简单实现类12 */13 class sample implements Iterator {14     private $_items ;15     16     public function __construct(){17         for($i=0;$i<3;$i++){18             $a=new order();19             $a->a=$i*3;20             $a->b=$i*4;21             $a->c=$i*5;22             $this->_items[]=$a;23         }24     }25     26     27  28 //     public function __construct(&$data) {29 //         $this->_items = $data;30 //     }31     public function current() {32         return current($this->_items);33     }34  35     public function next() {36         next($this->_items);   37     }38  39     public function key() {40         return key($this->_items);41     }42  43     public function rewind() {44         reset($this->_items);45     }46  47     public function valid() {                                                                              48         return ($this->current() !== FALSE);49     }50 }51  52 /** DEMO */53 $sa = new sample();54 print_r($sa);55 foreach ($sa AS $key => $row) {56     print_r($row->a);57 }58 59 ?>