Need help connecting PHP and mySQL

Hello everyone..
I'm trying to connect to my mySQL database named mydb using PHP.
The hosting site where I've created my database says : Server: "Localhost via UNIX socket"
So, if I connect with mysql_connect($hostname,$user,$password);
What will be the value of $hostname? will it be $hostname='localhost:9000' or 'localhost' or what should I put?

 

I think its localhost... Thanks for helping.

 

I recommend using PHP's PDO or mysqli instead of mysql_connect as mysql_connect won't be supported for long and the community has already begun the deprecation process.

 

Thanks for the suggestion guys... I realised that its normally given on the hosting sites... Anyways, thanks for helping...