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?>
<div id="reserved.interfaces" class="part">
 <h1 class="title">Predefined Interfaces and Classes</h1>
<h2>Table of Contents</h2><ul class="chunklist chunklist_part"><li><a href="class.traversable.php">Traversable</a></li><li><a href="class.iterator.php">Iterator</a></li><li><a href="class.iteratoraggregate.php">IteratorAggregate</a></li><li><a href="class.internaliterator.php">InternalIterator</a></li><li><a href="class.throwable.php">Throwable</a></li><li><a href="class.countable.php">Countable</a></li><li><a href="class.arrayaccess.php">ArrayAccess</a></li><li><a href="class.serializable.php">Serializable</a></li><li><a href="class.closure.php">Closure</a></li><li><a href="class.stdclass.php">stdClass</a></li><li><a href="class.generator.php">Generator</a></li><li><a href="class.fiber.php">Fiber</a></li><li><a href="class.weakreference.php">WeakReference</a></li><li><a href="class.weakmap.php">WeakMap</a></li><li><a href="class.stringable.php">Stringable</a></li><li><a href="class.unitenum.php">UnitEnum</a></li><li><a href="class.backedenum.php">BackedEnum</a></li><li><a href="class.sensitiveparametervalue.php">SensitiveParameterValue</a></li><li><a href="class.php-incomplete-class.php">__PHP_Incomplete_Class</a></li></ul>


 <div class="partintro">
  <p class="para">
   See also the <a href="spl.interfaces.php" class="link">SPL Interfaces</a> and <a href="reserved.classes.php" class="link">reserved classes</a>.
  </p>
 </div>

 




 




 




 



 




 




 




 




 




 




 




 



 




 




 




 



 



 



 





</div>
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