How to prevent/catch connection error with MySQLi [duplicate]

Question

How do you prevent a connection error if, for example, the database name is invalid, for the given code below?

$mysql = new mysqli('localhost', 'user', 'pass', 'wrongdatabase');

if($mysql->connect_errno)
    die($mysql->connect_error);

The if statement will output the right error message, but there will still be a warning sent from the first line, which says

Warning: mysqli::mysqli() [<a href='mysqli.mysqli'>mysqli.mysqli</a>]: (42000/1049): Unknown database 'wrongdatabase' in C:\wamp\www\example.php on line 14

I know with PDO you would simply wrap it in a try/catch block, but how to do it with MySQLi?

Answer 1

The answer here was incorrect and outdated. A more recent answer to this question can be found here