<!DOCTYPE html>
<html>
<head><title>My Registration Form</title></head>
<body>
Explain
<form method="POST" name="regform" action="insertform.php">
username:<input type="text" name="username">
password:<input type="text" name="password">
email:<input type="text" name="email">
mobile:<input type="text" name="mobile">
<input type="submit">
</form>
</body>
</html>