Added classes-constructor and removed description from templates

code/classes-constructor.php

@@ -0,0 +1,47 @@
+<?php
+
+// Whenever you create an object in PHP, you put parentheses after the class name.
+// In the previous examples, we always left the parentheses empty.
+class Hat {
+    public $color;
+
+    public function setColor($color)
+    {
+        $this->color = $color;
+    }
+}
+
+$hat = new Hat();
+
+// However, you can actually pass data into the parentheses like a function.
+// The data will be passed to a special function on the class called a constructor.
+class Ballcap
+{
+    public $color;
+
+    public function __construct($color )
+    {
+        $this->color = $color;
+    }
+}
+
+// A constructor is not required, but can make creating a new object easier.
+// They are usually used to define the initial value of a property.
+// Instead of writing:
+$hat = new Hat();
+$hat->setColor('Red');
+
+// You can write:
+$ballcap = new Ballcap('Blue');
+
+// Constructors do not return values because the return value is a always a new object.
+class Tophat
+{
+    public function __construct($color)
+    {
+        return $color;
+    }
+}
+
+// "$tophat" now holds an instance of Tophat, not the color "Grey".
+$tophat = new Tophat('Grey');