<div class="col-sm-6 col-md-6 col-md-offset-3" style="margin-top: 50px;">
<form action="signup.php" method="POST" enctype="multipart/form-data">
<label>First Name: </label>
<input type="text" name="first_name" placeholder="First Name" class="form-control"><br>
<label>Second Name: </label>
<input type="text" name="secname" placeholder="Second Name" class="form-control"><br>
<label>Surname: </label>
<input type="text" name="surname" placeholder="Surname" class="form-control"><br>
<label>Email: </label>
<input type="email" name="email" placeholder="Enter your email here" class="form-control"><br>
<label>Phone Number</label>
<input type="text" name="phone" placeholder="phone Number" class="form-control"><br>
<label>Date of Birth</label>
<input type="date" name="dob" placeholder="Date of Birth" class="form-control"><br>
<label>Password</label>
<input type="password" name="pass1" placeholder="Password" class="form-control"><br>
<label>Confirm Password</label>
<input type="password" name="pass2" placeholder="Confirm Password" class="form-control"><br>
<input type="submit" name="Submit" value="Signup" class="btn btn-primary">
<h5>Have an account? <a href="login.php">Login</a></h5>
</form>
<?php
if (isset($_POST['submit'])) {
$first_name = $POST['first_name'];
$secname = $POST['secname'];
$surname = $POST['surname'];
$email = $POST['email'];
$phone = $POST['phone'];
$dob = $POST['dob'];
$pass1 = $POST['pass1'];
$pass2 = $POST['pass2'];
$sql_insert ="INSERT INTO admin (id,first,sec,sur,email,phone,dob,pass1,pass2) VALUES(NULL'$first_name', '$secname', '$surname', '$email', '$phone', '$dob', '$pass1', '$pass2')";
mysqli_query($conn, $sql_insert);
header("location: signup.php?signup=success");
}else{
echo '<div class="alert alert-danger">';
echo "There was an error in inserting data!";
echo '</div';
}
?>
</div>Feel free to post a question.