PHP - Dynamically Create User Pages

Hi,

I have a table row that has a dropdown and two textboxes in it.

I would like to use a button that allows me to add another row beneath the existing row.  It cannot be added to the bottom of the table as there is further content beneath.

The content of the dropdown comes from a database query.

The dropdown on the new row should have the selection in the first row greyed out.

I expect this will need to be a js function but i dont really know where to start with it being dynamic content.

This is the table as it stands if this provides clarity of my intentions - picture below

					echo "<form method='post' id='staffOrderForm'>";
							$stmt->close();
										echo "<table id='staffOrderTable' class='table table-striped table-bordered mt-3 text-center'>";
						foreach($daterange as $date){
														
									echo"
										<tr>
											<th class='table-dark' colspan='3'>".$date->format("l - jS F Y")."</th>
										</tr>
										<tr>
											<th class='' colspan='3'>Management	</th>
										</tr>
										<tr>
											<th class='col-4'>Name</th>
											<th class='col-4'>Start Time</th>
											<th class='col-4'>End Time</th>
										</tr>
										<tr>
											<td>
												<select class='custom-select managerSelect'>";
												$managerRoleId = 1;
												$stmt = $conn->prepare("
												 	SELECT user_firstname, user_lastname, user_id
												    FROM ssm_user
												    WHERE user_role_id = ? ");
												$stmt->bind_param("i", $managerRoleId);
												$stmt->execute();
												$stmt->store_result();
												$stmt->bind_result($ufn, $uln, $uid);
												while($stmt->fetch()){echo "<option>".$ufn." ".$uln."</option>";};
												echo"</select>
											</td>
											<td><input class='form-control' type='' name=''></td>
											<td><input class='form-control' type='' name=''></td>
										</tr>
										<tr>
											<th colspan='3'>Chefs</th>
										<tr/>
										<tr>
											<th class='col-4'>Name</th>
											<th class='col-4'>Start Time</th>
											<th class='col-4'>End Time</th>
										</tr>
										<tr>
											<td>
												<select class='custom-select chefSelect'>";
													$chefRoleId = 2;
													$stmt = $conn->prepare("
												 	SELECT user_firstname, user_lastname, user_id
												    FROM ssm_user
												    WHERE user_role_id = ? ");
													$stmt->bind_param("i", $chefRoleId);
													$stmt->execute();
													$stmt->store_result();
													$stmt->bind_result($ufn, $uln, $uid);
													while($stmt->fetch()){echo "<option>".$ufn." ".$uln."</option>";};
												echo"</select>
											</td>
											<td><input class='form-control' type='' name=''></td>
											<td><input class='form-control' type='' name=''></td>
										</tr>";
						}
						echo "</table></form>";

I appreciate that i will likely have to add a button with an onclick but from there i am pretty lost.

As always i appreciate the help provided.

<?php
session_start();
$sql = $mysqli->query("SELECT user_level FROM imobiliare_users WHERE id=$id");
$user_level = $mysqli->query($sql);
echo $user_level;
if ($user_level !="administrator") {
	echo "You are not the proper user type to view this page";
    die();
  }
?>

<?php

	// Start the session in case of errors to display within the page of user creation
	session_start();
	$err_msg = array();
	$errflag = false;



	// Check if the submit button was pressed
	if ($_SERVER['REQUEST_METHOD'] === 'POST'
		&& $_POST['submit'] === 'Skapa')
	{
		// Crypt password
		$options = ['cost' => 10];

		$username = strip_tags($_POST['uname']);
		$password = strip_tags(password_hash($_POST['pword'], PASSWORD_DEFAULT, $options));
		$email = strip_tags($_POST['uname'], '@');

		// Check so all the fields are filled
		if ($_POST['uname'] == '' || $_POST['pword'] == '' || $_POST['pwordcheck'] == '')
		{
			$err_msg[] = 'Please enter all fields<br>';
			$errflag = true;
		}

		// See if passwords and confirm matches
		if ($_POST['pword'] !== $_POST['pwordcheck'])
		{
			$err_msg[] = 'Passwords doesn\'t match!<br>';
			$errflag = true;
		}

		// Check password length, atleast 8 characters
		if (strlen($_POST['pword']) < 7)
		{
			$err_msg[] = 'Password must be atleast 8 characters long';
			$errflag = true;
		}

		// Check if email exists
		include_once('../includes/db.inc.php');
		$db = new PDO(DB_INFO, DB_USER, DB_PASS);

		$sql = "SELECT COUNT(*) AS count FROM movies WHERE email = :emailadress";
			$stmt = $db->prepare($sql);
			$stmt->bindParam(':emailadress', $email);
			$stmt->execute();
			$row = $stmt->fetch(PDO::FETCH_ASSOC);

		if ($row > 0)
		{
			$err_msg[] = 'Email already taken!';
			$errflag = true;
			$db = NULL;
		}
		

		// Check if user exists
		include_once('../includes/db.inc.php');
		$db = new PDO(DB_INFO, DB_USER, DB_PASS);

		$sql = "SELECT uname FROM users WHERE uname = :username";
			$stmt = $db->prepare($sql);
			$stmt->bindParam(':username', $username);
			$stmt->execute();
			$row = $stmt->fetch(PDO::FETCH_ASSOC);

		if ($row > 0)
		{
			$err_msg[] = 'User already exists';
			$errflag = true;
			$db = NULL;
		}

		if ($errflag = false)
		{
			// Everything passed, create the user!
			include_once('../includes/db.inc.php');
			$db = new PDO(DB_INFO, DB_USER, DB_PASS);

			$sql = "INSERT INTO users (uname, pword, email) VALUES (:username, :password, :emailadress)";
				$stmt = $db->prepare($sql);
				$stmt->bindParam(':username', $username);
				$stmt->bindParam(':password', $password);
				$stmt->bindParam(':emailadress');
				$stmt->execute();

			$_SESSION['uname'] = $username;
			header('Location: ../template/header.php');
			exit;
		}
				
		// If any error, send the user back and display messages
		if ($errflag == true)
		{
			$_SESSION['err_msg'] = $err_msg;
			session_write_close();
			header('Location: ../user/create.php');
			exit;
		}
	}

	else
	{
		$_SESSION['err_msg'] = $err_msg;
			session_write_close();
			header('Location: ../user/create.php');
		exit;
	}

?>