Auto increment employee ID - php

Question

I just want to add an employee and after that, the employee ID will also increment. Also that textbox must be disabled
Also here's my code. All I want is to auto increment my employee ID when I add a new employee. I hope everyone will help me. Thank you in advance. :)
<center>
<form class="contact_form" action="#" method="post">
<h2>Register New Employee</h2>
<br/>
<table>
<tr>
<td><label for="emp">Emp ID:</label></td>
<td><input type="text" name="emp" placeholder="Emp ID" required /></td>
</tr>
<tr>
<td><label for="name">Name:</label></td>
<td><input type="text" name="fname" placeholder="First Name" required />
<input type="text" name="lname" placeholder="Last Name" required /></td>
</tr>
<tr>
<td><label for="address">Address:</label></td>
<td><input type="text" name="address" placeholder="Full Address" required /></td>
</tr>
<tr>
<td><label for="contact">Contact:</label></td>
<td><input type="text" name="contact" placeholder="Contact Number" required /></td>
</tr>
<tr>
<td><label for="type">Type:</label></td>
<td><select name="type" id="type">
<option>Type of Employee</option>
<option>Contractual</option>
<option>Regular</option>
</select>
</td>
</tr>
<tr>
<td><label for="salary">Salary:</label></td>
<td><input type="text" name="salary" placeholder="Emp Salary" required /></td>
</tr>
</table>
<br/>
<button class="submit" name="submit" type="submit" onclick="message()">Submit</button>
<button class="reset" name="reset" type="reset">Clear</button>
</form>
<?php
if (isset($_POST['submit'])) {
include 'alqdb.php';
$emp=$_POST['emp'];
$fname= $_POST['fname'];
$lname=$_POST['lname'];
$address=$_POST['address'];
$contact=$_POST['contact'];
$type=$_POST['type'];
$salary=$_POST['salary'];
mysqli_query($con, "INSERT INTO employee (EmpID,EmpFName,EmpLName,EmpAddress,ContactNumber,TypeofEmployee,Salary)
VALUES ('$emp','$fname','$lname','$address','$contact','$type','$salary')");
}
?>
</center>
</body>
<script language="javascript">
function message() {
alert("Successfully added!");
}
</script>

Answer 1

If you want to have an EmpID like EMP001
this code will work:
public function autoincemp()
{
global $value2;
$query = "SELECT empid from tbemployee order by empid desc LIMIT 1";
$stmt = $this->db->prepare($query);
$stmt->execute();
if ($stmt->rowCount() > 0) {
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$value2 = $row['empid'];
$value2 = substr($value2, 3, 5);
$value2 = (int) $value2 + 1;
$value2 = "EMP" . sprintf('%04s', $value2);
$value = $value2;
return $value;
} else {
$value2 = "EMP0001";
$value = $value2;
return $value;
}
}

Answer 2

You could modify your database to include AUTO_INCREMENT in EmpID.
You can disable input by doing <input type="text" name="emp" placeholder="Emp ID" required disabled />

Answer 3

Place AUTO_INCREMENT attribute to emp_id column in your DB. Remove that EMP ID field from your UI.
The AUTO_INCREMENT attribute can be used to generate a unique identity for new rows. Means, AUTO_INCREMENT automatically insert new incremented id for that field on each INSERT query
Reference

Answer 4

You can hide Emp ID code and change input type="text" to input type="hidden" and remove required in your form.
Now just use AUTO_INCREMENT for EmpId in your table.

Answer 5

It's late but you can do this,
$id = 1; //Your last record Id + 1
str_pad($id, 3, "0", STR_PAD_LEFT);
Hope this helps someone.
Reference

Answer 6

REATE TABLE dbo.tblUsers
(ID INT IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED,
UserID AS 'UID' + RIGHT('00000000' + CAST(ID AS VARCHAR(8)), 8) PERSISTED,
.... your other columns here....
)
Now, every time you insert a row into tblUsers without specifying values for ID or UserID:
INSERT INTO dbo.tblUsersCol1, Col2, ..., ColN)
VALUES (Val1, Val2, ....., ValN)