Iterator::valid
Note that, at least as of 5.3, you still aren't allowed to return a normal Array from getIterator().
In some places, the docs wrap the array into an ArrayObject and return that. DON'T DO IT. ArrayObject drops any empty-string keys on the floor when you iterate over it (again, at least as of 5.3).
Use ArrayIterator instead. I wouldn't be surprised if it didn't have its own set of wonderful bugs, but at the very least it works correctly when you use it with this method.
The IteratorAggregate interface
(PHP 5 >= 5.0.0)
Introduction
Interface to create an external Iterator.
Interface synopsis
IteratorAggregate
extends
Traversable
{
/* Methods */
}Example #1 Basic usage
<?php
class myData implements IteratorAggregate {
public $property1 = "Public property one";
public $property2 = "Public property two";
public $property3 = "Public property three";
public function __construct() {
$this->property4 = "last property";
}
public function getIterator() {
return new ArrayIterator($this);
}
}
$obj = new myData;
foreach($obj as $key => $value) {
var_dump($key, $value);
echo "\n";
}
?>
The above example will output something similar to:
string(9) "property1" string(19) "Public property one" string(9) "property2" string(19) "Public property two" string(9) "property3" string(21) "Public property three" string(9) "property4" string(13) "last property"
Table of Contents
- IteratorAggregate::getIterator — Retrieve an external iterator
add a note
User Contributed Notes
IteratorAggregate - [1 notes]
Tab Atkins ¶
1 year ago