PHPを使用してMySQLの最終更新行のIDを取得するにはどうすればよいですか?

<?php
// Establish database connection
$conn = new mysqli("host", "username", "password", "database_name");

// Prepare the MySQL UPDATE statement with an auto-incrementing variable
$sql = "SET @update_id := 0;
        UPDATE some_table SET column_name = 'value', id = (SELECT @update_id := id)
        WHERE some_other_column = 'value' LIMIT 1;";

if ($conn->query($sql) === TRUE) {
    // Get the last updated row's ID
    $result = $conn->query("SELECT @update_id;");
    $id = $result->fetch_assoc()["@update_id"];
    echo "Last updated row's ID: $id";
} else {
    echo "Error updating row: " . $conn->error;
}

$conn->close();
?>

SET @uids := null;
UPDATE footable
   SET foo = 'bar'
 WHERE fooid > 5
   AND ( SELECT @uids := CONCAT_WS(',', fooid, @uids) );
SELECT @uids;