added other options

TODO.txt

@@ -1,2 +1,4 @@
 ajax loading while running code
-snipt.net or similar integration
+snipt.net or similar integration
+unit testing framework implementation
+php code coverage

css/style.css

@@ -86,7 +86,7 @@ h1 {
 }
 
 #code{
-	width:85%;
+	width:84%;
 	height:450px;
    -moz-box-shadow: 0 5px 10px #AAAAAA;
    -webkit-box-shadow: 0 5px 10px #AAAAAA;

includes/classes/PE/timer.php

@@ -0,0 +1,48 @@
+<?php
+
+	class timer
+	{
+		private $start_time = NULL;
+		private $end_time = NULL;
+
+		private function getmicrotime()
+		{
+		  list($usec, $sec) = explode(" ", microtime());
+		  return ((float)$usec + (float)$sec);
+		}
+
+		function start()
+		{
+		  $this->start_time = $this->getmicrotime();
+		}
+
+		function stop()
+		{
+		  $this->end_time = $this->getmicrotime();
+		}
+
+		function result()
+		{
+			if (is_null($this->start_time))
+			{
+				exit('Timer: start method not called !');
+				return false;
+			}
+			else if (is_null($this->end_time))
+			{
+				exit('Timer: stop method not called !');
+				return false;
+			}
+
+			return round(($this->end_time - $this->start_time), 4);
+		}
+
+		# an alias of result function
+		function time()
+		{
+			$this->result();
+		}
+
+	}
+
+?>