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PO
primarykey
Id
3758064
data
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0
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CreationDate
2010-09-21T07:16:16.790
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2010-09-21T08:16:21.887
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2017-05-23T11:48:27.130
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3757589
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2
Score
6
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LastEditorDisplayName
text
Body
You do not have to do anything special to use <code>foreach</code> with objects. From the <a href="http://de.php.net/manual/en/language.oop5.iterations.php" rel="nofollow noreferrer">PHP manual on Object Iteration</a>: <blockquote> PHP 5 provides a way for objects to be defined so it is possible to iterate through a list of items, with, for example a foreach statement. By default, all visible properties will be used for the iteration. </blockquote> Example: <pre><code>class Foo { public $foo = 1; protected $bar = 2; private $baz = 3; } foreach(new Foo as $prop) echo $prop; // outputs 1 only </code></pre> Your class does not have to implement <code>Traversable</code> as suggested elsewhere and in fact, the class above doesn't: <pre><code>var_dump (new Foo instanceof Traversable); // FALSE </code></pre> You can implement one of the <a href="http://de.php.net/manual/en/class.iterator.php" rel="nofollow noreferrer">Iterator</a> or <a href="http://de.php.net/manual/en/class.iteratoraggregate.php" rel="nofollow noreferrer">IteratorAggregate</a> if you need more control over how the iteration should behave: <pre><code>class Foo implements IteratorAggregate { public $foo = 1; protected $bar = 2; private $baz = 3; public function getIterator() { return new ArrayIterator((array) $this); } } foreach(new Foo as $prop) echo $prop; // outputs 123 </code></pre> Because <code>Iterator</code> and <code>IteratorAggregate</code> extend <code>Traversable</code>, your class will now also be an instance of <code>Traversable</code>, but like shown above, it's not necessary for iterating the object. <pre><code>var_dump (new Foo instanceof Traversable); // TRUE </code></pre> You can also use an <a href="http://de.php.net/manual/en/class.arrayobject.php" rel="nofollow noreferrer">ArrayObject</a> to make the object behave like a hybrid between class and object. Or you can implement <a href="http://de.php.net/manual/en/class.arrayaccess.php" rel="nofollow noreferrer">ArrayAccess</a> to allow accessing the class with square brackets. You can also subclass the class to be <a href="http://de.php.net/manual/en/class.arrayiterator.php" rel="nofollow noreferrer">one of the Iterators</a> PHP provides. Further reading: <ul> <li><a href="http://www.phpro.org/tutorials/Introduction-to-SPL.html" rel="nofollow noreferrer">http://www.phpro.org/tutorials/Introduction-to-SPL.html</a></li> <li><a href="http://www.phpro.org/tutorials/Introduction-to-SPL-ArrayAccess.html" rel="nofollow noreferrer">http://www.phpro.org/tutorials/Introduction-to-SPL-ArrayAccess.html</a></li> <li><a href="https://stackoverflow.com/questions/2007695/php-object-like-array">PHP object like array</a></li> </ul>
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1. POObject acting like an array? (PHP)
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