How to remove row from mysqli table from a post href - php

Question

I am trying to remove a string from DB by a Href in a form. Why does this not work for me? The query is right, nothing happens.
<?php
// Make a MySQL Connection
mysql_connect("localhost", "root", "") or die(mysql_error());
mysql_select_db("cms") or die(mysql_error());
// Get all the data from the "example" table
$result = mysql_query("SELECT * FROM pages")
or die(mysql_error());
echo "<table border='1'>";
while ($row = mysql_fetch_array($result)) {
echo "<li class='list-group-item'>";
echo $row['header'];
echo "<br/>";
echo $row['description'];
echo "<br/>";
echo "<form method='POST'><a href='delete.php?id=".$row['page_id']."'>Remove</a></form>";
echo "</li>";
}
echo "</table>";
?>
delete.php
<?php
$db = new mysqli('localhost', 'root', '', 'cms');
$id = mysqli_query($db, "SELECT page_id FROM pages");
if (isset($_POST['id'])) {
mysqli_query($db, "DELETE FROM pages WHERE id='".$_GET['id']."'");
}
?>
And it still won't work. Just sends me to a blank page with no query.

Answer 1

Change this :
echo "<form method='POST'><a href='delete.php?".$row['page_id']."'>Remove</a></form>";
to
echo "<form method='POST' action='delete.php'><input type='hidden' value=".$row['page_id']." name='id'/><input type='submit' value='Remove'/></form>";
And in delete.php
This :
if (isset($_GET['id'])) {
To
if (isset($_POST['id'])) {
This
mysqli_query($db, "DELETE FROM pages WHERE id='".$_GET['id']."'");
to
mysqli_query($db, "DELETE FROM pages WHERE id='".$_POST['id']."'");