Source of: /manual/en/oop5.intro.php
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?>
<div id="oop5.intro" class="sect1">
<h2 class="title">Introduction</h2>
<p class="para">
Starting with PHP 5, the object model was rewritten to allow for better
performance and more features. This was a major change from PHP 4. PHP 5
has a full object model.
</p>
<p class="para">
Among the features in PHP 5 are the inclusions of
<a href="language.oop5.visibility.php" class="link">visibility</a>,
<a href="language.oop5.abstract.php" class="link">abstract</a> and
<a href="language.oop5.final.php" class="link">final</a> classes and methods,
additional <a href="language.oop5.magic.php" class="link">magic methods</a>,
<a href="language.oop5.interfaces.php" class="link">interfaces</a>,
<a href="language.oop5.cloning.php" class="link">cloning</a> and
<a href="language.oop5.typehinting.php" class="link">typehinting</a>.
</p>
<p class="para">
PHP treats objects in the same way as references or handles, meaning that
each variable contains an object reference rather than a copy of the entire
object. See
<a href="language.oop5.references.php" class="link">Objects and References</a>
</p>
<div class="tip"><b class="tip">Tip</b><p class="simpara">See also the
<a href="userlandnaming.php" class="xref">Userland Naming Guide</a>.</p></div>
</div><?php manual_footer(); ?>
