Untitled

<?php
if(isset($_POST['submit'])){
	include 'db.php';

	$firstname = $_POST['firstname'];
	$lastname = $_POST['lastname'];
	$username = $_POST['username'];
	$email = $_POST['email'];
	$password = $_POST['password'];
	$passwordconfirm = $_POST['passwordconfirm'];
	$age = $_POST['age'];
	$address = $_POST['address'];
	$gender = $_POST['gender'];
	$course = $_POST['course'];
	$occupation = $_POST['occupation'];

	$user = mysqli_query($conn, "SELECT * from users WHERE username = '$username' AND email = '$email'");
	$count = mysqli_num_rows($user);


	if($firstname =='' || $lastname =='' || $username =='' || $email =='' || $password =='' || $passwordconfirm =='' || $age =='' || $address =='' || $gender =='' || $course =='' || $occupation =='' ){
		echo "Please fill out the fields!";
	}
else if($password != $passwordconfirm) {
		 echo "Password does not match!";
	 }
else if($count != 0){
		echo "Username already exist!";
	}
	else{

		$insert = mysqli_query($conn, "INSERT INTO `users` (`firstname`,`lastname`,`username`,`email`,`password`,`age`,`address`,`gender`,`course`,`occupation`)  VALUES  ('$firstname','$lastname','$username','$email','$password','$age','$address','$gender','$course','$occupation')");
		if(!$insert){
		echo mysqli_errno();
}
	else{
		echo "Succesfully Registered!";
	}
	}
}


?>

<html>
<head><title>Registration Form</title></head>
<h1>Sign Up</h1>
<body>
<form method="POST" >
First Name:  <input type=text name=firstname pattern="[A-Za-z]+" placeholder="Enter your first name" required /> <br>
Last Name:  <input type=text name=lastname pattern="[A-Za-z]+" placeholder="Enter your last name" required /> <br>
Username:  <input type=text name=username pattern="[A-Za-z0-9]+" placeholder="Enter your username" required /> <br>
Email:  <input name="email" type="email" pattern="[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{1,63}$" placeholder="Email*" id="email" required /> <br>
Password:  <input type=password name=password pattern="[A-Za-z0-9]+" placeholder="Enter your password" /> <br>
Confirm Password:  <input type=password name=passwordconfirm  pattern="[A-Za-z0-9]+" placeholder="Confirm your password" required /> <br>
Age: <input type=text name=age pattern="[0-9]+" placeholder="Age"  required /> <br>
Home Address:  <input type=text name=address placeholder="Enter your home address" required /> <br>
Gender:  <input type=radio name=gender value=male />Male <input type=radio name=gender value=female />Female <br>
Course: <select name=course >
<option>IT</option>
<option>OM</option>
<option>MKT</option>
<option>FM</option>
</select><br>
Occupation: <select name=occupation >
<option>Student</option>
<option>Employed</option>
<option>Unemployed</option>
</select><br>
<input type=submit name=submit value=submit />


</form>
</body>

</html>