Register form

[BasiM]

Hello.
 
Hope someone can help me.
 
I have created a simple user registration form. The user is required to insert data into the fields and insert a username and password.
The server will check in the database if the username and password don't already exist. If the username and password are already in the database it will print out a message that username and password already exist. 
 
If username and password don't exist it will run the INSERT statement and display a user successful message.
 
My issue/problem. There is no error message printed. When I run the script it says ''User successful''. When I run the script again entering the same username and password, it prints the ''User successful message'' yet no data is inserted into the database.
 
Hope someone can help
 
Thanx
 
 
 
<?php
/*
 * author :basetsanamnl0@gmail.com
 *
 *
 *
 */
include 'connection.php';
 
    if(isset ($_POST['name'] ) && isset ($_POST['surname']) && isset ($_POST[ 'id_number']) && isset ($_POST[ 'contact_number'])&& isset ($_POST[ 'job_id'])&& isset ($_POST[ 'username'])&& isset ($_POST['password'])) // getting the values from the post
    {
 
    $connection = new createConnection(); // creating connection
 
    $connect = $connection->connectToDatabase(); // connect to database
 
    $connection->selectDatabase(); // select database
     
// escape sql injection
  $name = mysql_real_escape_string($_POST['name']); 
 $surname =mysql_real_escape_string($_POST['surname']);
$id_number = mysql_real_escape_string($_POST['id_number']);
$contact_number = mysql_real_escape_string($_POST['contact_number']);
$job_id = mysql_real_escape_string($_POST['job_id']);
$username = mysql_real_escape_string($_POST['username']);
$password = mysql_real_escape_string($_POST['password']);
 
      $query=mysql_query("SELECT * FROM `medionline`.`employees` WHERE username='$username' AND password= '$password'"); 
// Check if the username and password already exist in the database
 
if (mysql_num_rows($query) > 0) { 
 
echo "Username and password already exist!";
 
 
}  else {
// execute the insert query
    mysql_query("INSERT INTO `medionline`.`employees`(name,surname,id_number,contact_number,job_id,username, password) VALUES     ('$name','$surname','$id_number','$contact_number','$job_id','$username','$password')"); // query for insert data
 
}
 
   echo ("User registration Successfull"); 
   $connection->closeConnection(); // closing the connection
    }
 
    else
    {
        echo "Error occured!"; // display error message
    }
 
 
?>

[Barand]

You output the success message in all cases

    if (mysql_num_rows($query) > 0)
        {
        echo "Username and password already exist!";
        }
    else
        {
        // execute the insert query
        mysql_query ("INSERT INTO `medionline`.`employees`(name,surname,id_number,contact_number,job_id,username, password) VALUES     ('$name','$surname','$id_number','$contact_number','$job_id','$username','$password')"); // query for insert data
        }

    echo ("User registration Successfull");
    $connection->closeConnection(); // closing the connection

Easier to see when you use indentation

[BasiM]

Thank you.

Sorry about not using indentation. Will arrange my script and use it.