php-tail 추가

vendor/php-extended/php-system/src/UnknownOs.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace PhpExtended\System;
+
+/**
+ * UnknownOs class file.
+ *
+ * This class represents an Os this library was not able to detect.
+ *
+ * @author Anastaszor
+ */
+class UnknownOs extends OperatingSystem
+{
+	/**
+	 * {@inheritDoc}
+	 *
+	 * @see OperatingSystem::isUnix()
+	 */
+	public function isUnix()
+	{
+		return false;
+	}
+	
+	/**
+	 * {@inheritDoc}
+	 *
+	 * @see OperatingSystem::isWindows()
+	 */
+	public function isWindows()
+	{
+		return false;
+	}
+	
+}