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modules/newsletterpro/classes/Version.php

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+<?php
+/**
+* Since 2013 Ovidiu Cimpean.
+*
+* Ovidiu Cimpean - Newsletter Pro © All rights reserved.
+*
+* DISCLAIMER
+*
+* Do not edit, modify or copy this file.
+* If you wish to customize it, contact us at addons4prestashop@gmail.com.
+*
+* @author    Ovidiu Cimpean <addons4prestashop@gmail.com>
+* @copyright Since 2013 Ovidiu Cimpean
+* @license   Do not edit, modify or copy this file
+*
+* @version   Release: 4
+*/
+
+namespace PQNP;
+
+class Version
+{
+    public static function isEqual($version)
+    {
+        return version_compare($version, _PS_VERSION_, '==');
+    }
+
+    public static function isLower($version)
+    {
+        return version_compare($version, _PS_VERSION_, '>');
+    }
+
+    public static function isHigher($version)
+    {
+        return !(self::isLower($version));
+    }
+
+    public static function compare($va, $vb, $sign)
+    {
+        return version_compare($va, $vb, $sign);
+    }
+
+    public static function isBetween($lower_version, $higher_version)
+    {
+        return !Version::isLower($lower_version) && Version::isLower($higher_version);
+    }
+}