I'm trying to connect with mysql_connect using PHP.

I was wondering how to find the hostname when I turn my MacBook into a server by turning on the personal webpage.

I have Apache, MySQL and PHP enabled.

Is the hostname what you ssh into? It says that my computer's name is spiderman and it could be accessed with spiderman.local, but it doesn't seem to work. I've also tried using my IP address.

  • Are you SSHing into the computer from the same local network?
    – daviesgeek
    Commented Oct 30, 2011 at 22:47

5 Answers 5


In a terminal run the command:

$ hostname

The environment variable $HOSTNAME may not necessarily be set.


In general, you get the hostname by typing


in Terminal.

But for your server setup, if no one has messed with configuration, localhost will be the hostname to use; in safe mode, localhost:3306 (that is port 3306) is the default. (cf. http://php.net/manual/en/function.mysql-connect.php )

BUT: You should make sure that you actually started the MySQL server. Starting command depends on your installation.

  • This environment variable frequently won't be set...
    – lindes
    Commented May 3, 2018 at 22:42

It depends if you are doing it from within a script program where the environment has been set up correctly, either the following may work or suit you:

~$ uname -n
~$ echo $HOSTNAME

If you want to connect to MySQL running locally, try or localhost.


System Preferences.app > Sharing > Computer Name

Sharing Preferences

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