Execute MySQL Delete on Button Click - php

Question

In my code, I am showing a table within my database called staff in a HTML table and I want to add a delete button to each row in the HTML table that when clicked, it will delete the record its associated with.
Based on searching other solutions, my code looks like this:
staff.php:
require_once('../connection.php');
//delete row on button click
if(isset($_GET["del"])){
$idc = $_GET["del"];
if($VisitorManagement->query("DELETE FROM staff WHERE id=$idc")){
header('Location: delete-thankyou.php');
} else {
echo "Failed to delete staff member.";
}
}
$result = mysqli_query($VisitorManagement, "SELECT * FROM staff ORDER BY fullName");
echo "<table id='staff'>
<thead>
<tr>
<th>Name</th>
<th>Email</th>
<th></th>
</tr>
</thead>";
while($row = mysqli_fetch_array($result))
{
echo "<tbody>";
echo "<tr>";
echo "<td>" . $row['fullName'] . "</td>";
echo "<td>" . $row['email'] . "</td>";
echo "<td><a class='button alert' href='staff.php?del=".$row["idc"]."'>Delete</a></td>";
echo "</tr>";
}
echo "</tbody>";
echo "</table>";
connection.php:
$hostname_VisitorManagement = "localhost";
$database_VisitorManagement = "visitor-management";
$username_VisitorManagement = "***";
$password_VisitorManagement = "***";
$VisitorManagement = mysqli_connect($hostname_VisitorManagement, $username_VisitorManagement, $password_VisitorManagement, $database_VisitorManagement);
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
date_default_timezone_set('America/New_York');
Unfortunately, when I go to the click one of the buttons, it fails to delete the record and echoes the error message pre-defined in staff.php. Am I missing something to get this to work?

Answer 1

I was able to fix it by changing all instances of idc to id.
New code is:
require_once('../connection.php');
//delete row on button click
if(isset($_GET["del"])){
$id = $_GET["del"];
if($VisitorManagement->query("DELETE FROM staff WHERE id=$id")){
header('Location: delete-thankyou.php');
} else {
echo "Failed to delete staff member.";
}
}
$result = mysqli_query($VisitorManagement, "SELECT * FROM staff ORDER BY fullName");
echo "<table id='staff'>
<thead>
<tr>
<th>Name</th>
<th>Email</th>
<th></th>
</tr>
</thead>";
while($row = mysqli_fetch_array($result))
{
echo "<tbody>";
echo "<tr>";
echo "<td>" . $row['fullName'] . "</td>";
echo "<td>" . $row['email'] . "</td>";
echo "<td><a class='button alert' href='staff.php?del=".$row["id"]."'>Delete</a></td>";
echo "</tr>";
}
echo "</tbody>";
echo "</table>";