Iterator Pattern

最新推荐文章于 2025-01-05 00:04:57 发布

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最新推荐文章于 2025-01-05 00:04:57 发布

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分类专栏： php 文章标签： iterator function object class output

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本文介绍了一种使用PHP实现自定义迭代器的方法。通过创建一个名为iter的类，该类可以容纳多个对象，并提供了类似next、prev、current等内置数组操作函数的功能。演示了如何向迭代器中添加对象及调用迭代器的不同方法来遍历这些对象。

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Just like next,prev,current operator function in array , it's iterator , and we can write our iterator class by ourselfse :

<?php class iter{ private $container; function add($name,$obj){ $this->container[$name] = new $obj; } function reset_item(){ return reset($this->container); } function pre_item(){ return prev($this->container); } function next_item(){ return next($this->container); } function current_item(){ return current($this->container); } } class obj1{ function output(){ echo "this is object1 "; } } class obj2{ function output(){ echo "this is object2 "; } } class obj3{ function output(){ echo "this is object3 "; } } $iter = new iter(); $iter->add('obj1','obj1'); $iter->add('obj2','obj2'); $iter->add('obj3','obj3'); $iter->current_item()->output();//this is object1 $iter->next_item()->output(); //this is object2 $iter->next_item()->output(); //this is object3 $iter->pre_item()->output(); //this is object2 $iter->reset_item()->output(); //this is object1