diff --git a/add.php b/add.php
index 8f21db0..a6a9712 100644
--- a/add.php
+++ b/add.php
@@ -9,38 +9,50 @@
 include_once("config.php");
 
 if(isset($_POST['Submit'])) {	
-	$name = mysqli_real_escape_string($mysqli, $_POST['name']);
-	$age = mysqli_real_escape_string($mysqli, $_POST['age']);
-	$email = mysqli_real_escape_string($mysqli, $_POST['email']);
-		
+
+	unset($_POST['Submit']);
+	//escape string function
+	$_POST = escapeStringArr($_POST);
+			
 	// checking empty fields
-	if(empty($name) || empty($age) || empty($email)) {
-				
-		if(empty($name)) {
-			echo "<font color='red'>Name field is empty.</font><br/>";
-		}
-		
-		if(empty($age)) {
-			echo "<font color='red'>Age field is empty.</font><br/>";
-		}
-		
-		if(empty($email)) {
-			echo "<font color='red'>Email field is empty.</font><br/>";
-		}
-		
+	$validateStatus = validatePost($_POST);
+	if($validateStatus['isValid']) { //if having empty fields	
+		//print error text			
+		echo $validateStatus['err'];
 		//link to the previous page
 		echo "<br/><a href='javascript:self.history.back();'>Go Back</a>";
 	} else { 
 		// if all the fields are filled (not empty) 
 			
 		//insert data to database	
-		$result = mysqli_query($mysqli, "INSERT INTO users(name,age,email) VALUES('$name','$age','$email')");
+		$sql = "INSERT INTO users (`".implode("`, `" , array_keys($_POST))."`) VALUES ('".implode("', '" , $_POST)."')";
+		$result = mysqli_query($mysqli, $sql);
 		
 		//display success message
 		echo "<font color='green'>Data added successfully.";
 		echo "<br/><a href='index.php'>View Result</a>";
 	}
 }
+
+function escapeStringArr($postArr){
+	foreach ($postArr as $key => $value) {
+		$postArr[$key] = mysqli_real_escape_string($mysqli, $value);
+	}
+	return $postArr;
+}
+
+function validatePost($postArr){
+	$err = "";
+	$isValid = true;
+	foreach ($postArr as $key => $value) {
+		if(empty($value)){
+			$err = $err."<font color='red'>".$key." field is empty.</font><br/>";
+			$isValid = false;
+		}		
+	}
+	return array('err' => $err , 'isValid' => $isValid);
+}
+
 ?>
 </body>
 </html>