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copied!<p>Now that PHP 5.3 is widely available in the wild, I wanted to put together a summary answer to this question to reflect newly available techniques. </p> <p>As mentioned in the other answers, PHP 5.3 has introduced <a href="http://php.benscom.com/manual/en/language.oop5.late-static-bindings.php" rel="nofollow noreferrer">Late Static Binding</a> via a new <a href="http://php.benscom.com/manual/en/language.oop5.static.php" rel="nofollow noreferrer"><code>static</code></a> keyword. As well, a new <a href="http://php.benscom.com/manual/en/function.get-called-class.php" rel="nofollow noreferrer"><code>get_called_class()</code></a> function is also available that can only be used within a class method (instance or static). </p> <p>For the purpose of determining the class as was asked in this question, the <code>get_called_class()</code> function is appropriate:</p> <pre><code><?php abstract class ParentClass { public static function whoAmI () { return get_called_class(); } } class ChildClass1 extends ParentClass { } class ChildClass2 extends ParentClass { } // Shows 'ChildClass1' print ChildClass1::whoAmI(); print "\n"; // Shows 'ChildClass2' print ChildClass2::whoAmI(); print "\n"; </code></pre> <p>The <a href="http://php.benscom.com/manual/en/function.get-called-class.php" rel="nofollow noreferrer">user contributed notes for <code>get_called_class()</code></a> include a few sample implementations that should work in PHP 5.2 as well by making use of <code>debug_backtrace()</code>.</p>

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