I’m doing some local Wordpress development, so I set up Apache, PHP, and MySQL using MacPorts. Apparently, the default setup does not set the location of the MySQL socket for you, so I copied /opt/local/etc/php5/php.ini-development to /opt/local/etc/php5/php.ini and changed these lines:
pdo_mysql.default_socket=/opt/local/var/run/mysql5/mysqld.sock mysql.default_socket =/opt/local/var/run/mysql5/mysqld.sock mysqli.default_socket =/opt/local/var/run/mysql5/mysqld.sock
