BLOCK TRAFFIC FROM CUSTOM REFERRER DOMAIN PHP code lines

Hello, I need the PHP code lines that will redirect visits/hits coming from a specific domain and redirect it to a custom URL. I currently receive traffic from junk domains that I want to block. Sample: If visit/hit comes from domain ([login to view URL]) then redirect to [login to view URL] I need to be able to specify more than 1 blacklisted domains AND to leave other lines EMPTY. I will add more blacklisted domains later so add up to 10 only. So if REFERRER is in Blacklisted domain redirect to URL (A) [login to view URL] without loading the *.php page where I will add your php code lines. If REFERRER URL not in blacklisted domains list then continue to load current php page where I will add your code. Please test before delivery. Note: I don't need admin area or database, I will edit the settings from PHP code lines directly. Thanks