PHP - Detailed explanation of IteratorAggregate interface
PHP IteratorAggregate is also called an aggregate iterator. It provides an interface for creating external iterators. The interface summary is as follows:
IteratorAggregate extends Traversable {
abstract public Traversable getIterator ( void )
}
When implementing the getIterator method, you must return an instance of a class that implements the Iterator interface.
Example description:
<?php
/**
* 利用聚合式迭代器，并返回一个实现了Iterator接口的类的实例
*
* @author 疯狂老司机
*/
class myData implements IteratorAggregate {
public $one = "Public property one";
public $two = "Public property two";
public $three = "Public property three";
public function __construct() {
$this->last = "last property";
}
public function getIterator() {
return new ArrayIterator($this);
}
}
$obj = new myData;
foreach($obj as $key => $value) {
var_dump($key, $value);
echo '<br>';// Linux：echo "\n";
}
?>The above introduces the detailed explanation of the PHP - IteratorAggregate interface, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.
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