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msd2/tracking/piwik/core/Version.php

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+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik;
+
+/**
+ * Matomo version information.
+ *
+ * @api
+ */
+final class Version
+{
+    /**
+     * The current Matomo version.
+     * @var string
+     */
+    const VERSION = '3.9.1';
+
+    public function isStableVersion($version)
+    {
+        return (bool) preg_match('/^(\d+)\.(\d+)\.(\d+)$/', $version);
+    }
+
+    public function isVersionNumber($version)
+    {
+        return $this->isStableVersion($version) || $this->isNonStableVersion($version);
+    }
+
+    private function isNonStableVersion($version)
+    {
+        return (bool) preg_match('/^(\d+)\.(\d+)\.(\d+)-.{1,4}(\d+)$/', $version);
+    }
+}