Added Tutorial 9 code

Author: dima_los

tutorial-009-strings/strings.php

@@ -0,0 +1,14 @@
+<?php
+
+$firstName = 'Spider';
+$lastName = 'Man';
+$fullName = $firstName . ' ' . $lastName;
+$fullNameDQ = "I'm {$firstName} $lastName";
+$escaping = 'I"m';
+
+/**
+ * \n
+ * \r
+ */
+
+var_dump($fullName, $fullNameDQ);