Can I try/catch a warning?

I need to catch some warnings being thrown from some php native functions and then handle them. Specifically: array dns_get_record ( string $hostname [, int $type= DNS_ANY [, array &$authns [, array &$addtl ]]] ) It throws a warning when the DNS query fails. `try`/`catch` doesn't work because a warning is not an exception. I now have 2 options: 1. `set_error_handler` seems like overkill because I have to use it to filter every warning in the page (is this true?); 2. Adjust error reporting/display so these warnings don't get echoed to screen, then check the return value; if it's `false`, no records is found for hostname. What's the best practice here?