diff --git a/index.php b/index.php
index ef4660f..a67f691 100644
--- a/index.php
+++ b/index.php
@@ -1,3 +1,24 @@
-<?php 
-    echo 'Merhaba, Dünya!';
-?>
\ No newline at end of file
+<?php
+// Class definition that creates an instance of a class
+class ExampleClass {
+    public $exampleVariable; // a variable belonging to the class instance
+
+    // Constructor function, called when an object is created
+    public function __construct($value) {
+        $this->exampleVariable = $value; // assigns value to the instance variable
+    }
+
+    // Function that adds two numbers
+    public function add($number1, $number2) {
+        return $number1 + $number2; // returns the sum
+    }
+}
+
+// Example function: multiplies two numbers
+function multiply($number1, $number2) {
+    return $number1 * $number2; // returns the product
+}
+
+// Array example
+$sampleArray = [1, 2, 3, 4, 5]; // array of numbers
+?>