Move php to php5 and add a php7 example that uses composer

php7/src/Item.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App;
+
+class Item {
+
+    public $name;
+    public $sell_in;
+    public $quality;
+
+    function __construct($name, $sell_in, $quality) {
+        $this->name    = $name;
+        $this->sell_in = $sell_in;
+        $this->quality = $quality;
+    }
+
+    public function __toString() {
+        return "{$this->name}, {$this->sell_in}, {$this->quality}";
+    }
+}
+