Confused with PHP While Loop - php

Question

I have the following output:
12345: 1
1234: 7
1234: 7
1234: 6
1234: 4
It is produced from a URL which ends in "?id=12345". What's supposed to happen is that the id is incremented by 1 when the id exists in the database or it is added when it doesn't. The last result produced by 1234 is right, but how do I stop the previous results of 1234 from being produced?
while ($row = $database->row()->fetch()) {
$id = $row["id"];
$count = $row["count"];
if ($id != $_GET["id"]) {
$insert = new MySQLConnect();
$insert->query("INSERT INTO links VALUES (:id, 1);");
$insert->run(array("id" => $_GET["id"]);
} elseif ($id == $_GET["id"]) {
$update = new MySQLConnect();
$update->query("UPDATE links SET count=count + 1 WHERE id=:id;");
$update->run(array("id" => $_GET["id"]);
}
}
EDIT:
function display_data()
{
$display = new MySQLConnect();
$display->query("SELECT * FROM links;");
$display->run();
while ($row = $display->row()->fetch()) {
$id = $row["id"];
$count = $row["count"];
$GLOBALS["output"] .= $id . ": " . $count . "<br/>";
}
}

Answer 1

You don't need the "while" if you just want to create/update the ID sent as parameter
$useId = (int)$_GET["id"];
$insert = new MySQLConnect();
$insert->query("INSERT INTO `links` (`id`, `count`) VALUES ('$useId', 1) ON DUPLICATE KEY UPDATE `count` = `count` + 1");
$insert->run();