Hi, 3 different tutorials teach 3 different ways on how to get php mysqli echo connection errors. Which one should I memorise out of these 3 you advise ? I'd like your rankings on these 3 atleast .... 1. https://www.php.net/manual/en/function.mysqli-connect.php $link = mysqli_connect("127.0.0.1", "my_user", "my_password", "my_db"); if (!$link) {     echo "Error: Unable to connect to MySQL." . PHP_EOL;     echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;     echo