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<title>New Classes and Interfaces</title>
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<h2 class="title">New Classes and Interfaces</h2>
<p class="simpara">
The following classes were introduced in PHP 5.4.0:
</p>
<p class="simpara"><a href="book.spl.html" class="link">SPL</a>:</p>
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<a href="class.callbackfilteriterator.html" class="classname">CallbackFilterIterator</a>
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<a href="class.recursivecallbackfilteriterator.html" class="classname">RecursiveCallbackFilterIterator</a>
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</li>
</ul>
<p class="simpara"><a href="book.reflection.html" class="link">Reflection</a>:</p>
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<a href="class.reflectionzendextension.html" class="classname">ReflectionZendExtension</a>
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</li>
</ul>
<p class="simpara"><a href="book.json.html" class="link">Json</a>:</p>
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<li class="listitem">
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<a href="class.jsonserializable.html" class="classname">JsonSerializable</a>
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</li>
</ul>
<p class="simpara"><a href="book.session.html" class="link">Session</a>:</p>
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<a href="class.sessionhandler.html" class="classname">SessionHandler</a>
</span>
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<a href="class.sessionhandlerinterface.html" class="classname">SessionHandlerInterface</a>
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</li>
</ul>
<p class="simpara"><a href="book.snmp.html" class="link">Snmp</a>:</p>
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<a href="class.snmp.html" class="classname">SNMP</a>
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<p class="simpara"><a href="book.intl.html" class="link">Intl</a>:</p>
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<a href="class.transliterator.html" class="classname">Transliterator</a>
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<div class="up"><a href="migration54.html">Migrating from PHP 5.3.x to PHP 5.4.x</a></div>
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