get Latest Registered Id?

Question

Code :

Want to have only latest registered employeeId in drop down list from database ?

public function getEmployeeId() {
        if (!isset($_SESSION["email"]) || !isset($_SESSION["passwrd"])) {
            header("Location:index.php");
            // Cannot Access this page without Login.
        }
        if (empty($_POST)) {
            $query = mysqli_query($this->connection, "SELECT EmployeeId FROM employees") or die("Query execution failed: " . mysqli_error());
            while ($row = $query->fetch_array()) {
                $id = $row["EmployeeId"];
                $_SESSION["ID"] = $id;
            }
        }
    }

Here is my HTML Code Snippet :

 <td>
                    <select name="EmployeeId" required autofocus class='form-control'>
                        <option value=""> ----Select----</option>
                        <?php
                        if (isset($_SESSION["ID"])) {
                            echo "<option value = " . $_SESSION["ID"] . ">" . $_SESSION["ID"] . "</option>";
                        }
                        ?>
                    </select>
                </td>

Answer 1

您的查询应为：

SELECT MAX(EmployeeId) AS EmployeeId FROM employees