diff --git a/hamming.php b/hamming.php
index b457e65..ba19559 100644
--- a/hamming.php
+++ b/hamming.php
@@ -10,4 +10,12 @@ function distance($a, $b)
     //
     // YOUR CODE GOES HERE
     //
+	$a1 = str_split($a);
+    $a2 = str_split($b);
+$x=0;
+for( $i=0;$i<count($a1);$i++)
+if($a1[$i] !=$a2[$i])	$x=$x+1;
+return $x;
 }
+echo distance('hello','hilko');
+?>
diff --git a/hamming.php~ b/hamming.php~
new file mode 100644
index 0000000..b457e65
--- /dev/null
+++ b/hamming.php~
@@ -0,0 +1,13 @@
+<?php
+
+//
+// This is only a SKELETON file for the "Hamming" exercise. It's been provided as a
+// convenience to get you started writing code faster.
+//
+
+function distance($a, $b)
+{
+    //
+    // YOUR CODE GOES HERE
+    //
+}