sql command

[PJourdan <info@xxxxxxxxxxxxxxxxxxxxx>]

Could someone explain to me why sql commands work in php with pgsql? I have 
a curious situation where the author used sql commands like sqlconnect to 
access the database rather than pg-connect as well as other commands that 
are either psql or sql - I'm a litle confused here. This is in a .conf file:
sqlconnect(array('server'=>'tester.videotron.ca','user'=>'mum',
    'database'=>'mum','password'=>'123456' ) );
I'm looking for the theory behind all this. :-)
Thanks
Phil Jourdan