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lib/compat/is_a.php

@@ -0,0 +1,47 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP Version 4                                                        |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1997-2004 The PHP Group                                |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 3.0 of the PHP license,       |
+// | that is bundled with this package in the file LICENSE, and is        |
+// | available at through the world-wide-web at                           |
+// | http://www.php.net/license/3_0.txt.                                  |
+// | If you did not receive a copy of the PHP license and are unable to   |
+// | obtain it through the world-wide-web, please send a note to          |
+// | license@php.net so we can mail you a copy immediately.               |
+// +----------------------------------------------------------------------+
+// | Authors: Aidan Lister <aidan@php.net>                                |
+// +----------------------------------------------------------------------+
+//
+// $Id: is_a.php,v 1.2 2005/11/21 10:57:23 ggiunta Exp $
+
+
+/**
+ * Replace function is_a()
+ *
+ * @category    PHP
+ * @package     PHP_Compat
+ * @link        http://php.net/function.is_a
+ * @author      Aidan Lister <aidan@php.net>
+ * @version     $Revision: 1.2 $
+ * @since       PHP 4.2.0
+ * @require     PHP 4.0.0 (user_error) (is_subclass_of)
+ */
+if (!function_exists('is_a')) {
+    function is_a($object, $class)
+    {
+        if (!is_object($object)) {
+            return false;
+        }
+
+        if (get_class($object) == strtolower($class)) {
+            return true;
+        } else {
+            return is_subclass_of($object, $class);
+        }
+    }
+}
+
+?>