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+<?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: Philippe Jausions <Philippe.Jausions@11abacus.com>          |
+// |          Aidan Lister <aidan@php.net>                                |
+// +----------------------------------------------------------------------+
+//
+// $Id: version_compare.php,v 1.1 2005/07/11 16:34:36 ggiunta Exp $
+
+
+/**
+ * Replace version_compare()
+ *
+ * @category    PHP
+ * @package     PHP_Compat
+ * @link        http://php.net/function.version_compare
+ * @author      Philippe Jausions <Philippe.Jausions@11abacus.com>
+ * @author      Aidan Lister <aidan@php.net>
+ * @version     $Revision: 1.1 $
+ * @since       PHP 4.1.0
+ * @require     PHP 4.0.0 (user_error)
+ */
+if (!function_exists('version_compare')) {
+    function version_compare($version1, $version2, $operator = '<')
+    {
+        // Check input
+        if (!is_scalar($version1)) {
+            user_error('version_compare() expects parameter 1 to be string, ' .
+                gettype($version1) . ' given', E_USER_WARNING);
+            return;
+        }
+
+        if (!is_scalar($version2)) {
+            user_error('version_compare() expects parameter 2 to be string, ' .
+                gettype($version2) . ' given', E_USER_WARNING);
+            return;
+        }
+
+        if (!is_scalar($operator)) {
+            user_error('version_compare() expects parameter 3 to be string, ' .
+                gettype($operator) . ' given', E_USER_WARNING);
+            return;
+        }
+
+        // Standardise versions
+        $v1 = explode('.',
+            str_replace('..', '.',
+                preg_replace('/([^0-9\.]+)/', '.$1.',
+                    str_replace(array('-', '_', '+'), '.',
+                        trim($version1)))));
+
+        $v2 = explode('.',
+            str_replace('..', '.',
+                preg_replace('/([^0-9\.]+)/', '.$1.',
+                    str_replace(array('-', '_', '+'), '.',
+                        trim($version2)))));
+
+        // Replace empty entries at the start of the array
+        while (empty($v1[0]) && array_shift($v1)) {}
+        while (empty($v2[0]) && array_shift($v2)) {}
+
+        // Release state order
+        // '#' stands for any number
+        $versions = array(
+            'dev'   => 0,
+            'alpha' => 1,
+            'a'     => 1,
+            'beta'  => 2,
+            'b'     => 2,
+            'RC'    => 3,
+            '#'     => 4,
+            'p'     => 5,
+            'pl'    => 5);
+
+        // Loop through each segment in the version string
+        $compare = 0;
+        for ($i = 0, $x = min(count($v1), count($v2)); $i < $x; $i++) {
+            if ($v1[$i] == $v2[$i]) {
+                continue;
+            }
+            $i1 = $v1[$i];
+            $i2 = $v2[$i];
+            if (is_numeric($i1) && is_numeric($i2)) {
+                $compare = ($i1 < $i2) ? -1 : 1;
+                break;
+            }
+            // We use the position of '#' in the versions list
+            // for numbers... (so take care of # in original string)
+            if ($i1 == '#') {
+                $i1 = '';
+            } elseif (is_numeric($i1)) {
+                $i1 = '#';
+            }
+            if ($i2 == '#') {
+                $i2 = '';
+            } elseif (is_numeric($i2)) {
+                $i2 = '#';
+            }
+            if (isset($versions[$i1]) && isset($versions[$i2])) {
+                $compare = ($versions[$i1] < $versions[$i2]) ? -1 : 1;
+            } elseif (isset($versions[$i1])) {
+                $compare = 1;
+            } elseif (isset($versions[$i2])) {
+                $compare = -1;
+            } else {
+                $compare = 0;
+            }
+
+            break;
+        }
+
+        // If previous loop didn't find anything, compare the "extra" segments
+        if ($compare == 0) {
+            if (count($v2) > count($v1)) {
+                if (isset($versions[$v2[$i]])) {
+                    $compare = ($versions[$v2[$i]] < 4) ? 1 : -1;
+                } else {
+                    $compare = -1;
+                }
+            } elseif (count($v2) < count($v1)) {
+                if (isset($versions[$v1[$i]])) {
+                    $compare = ($versions[$v1[$i]] < 4) ? -1 : 1;
+                } else {
+                    $compare = 1;
+                }
+            }
+        }
+
+        // Compare the versions
+        if (func_num_args() > 2) {
+            switch ($operator) {
+                case '>':
+                case 'gt':
+                    return (bool) ($compare > 0);
+                    break;
+                case '>=':
+                case 'ge':
+                    return (bool) ($compare >= 0);
+                    break;
+                case '<=':
+                case 'le':
+                    return (bool) ($compare <= 0);
+                    break;
+                case '==':
+                case '=':
+                case 'eq':
+                    return (bool) ($compare == 0);
+                    break;
+                case '<>':
+                case '!=':
+                case 'ne':
+                    return (bool) ($compare != 0);
+                    break;
+                case '':
+                case '<':
+                case 'lt':
+                    return (bool) ($compare < 0);
+                    break;
+                default:
+                    return;
+            }
+        }
+
+        return $compare;
+    }
+}
+
+?>
\ No newline at end of file