Description
bool 
pg_close ( [resource connection] )
   pg_close() closes the non-persistent
   connection to a PostgreSQL database associated with the given
   connection resource.
  
Note: 
    Using pg_close() is not usually necessary, as
    non-persistent open connections are automatically closed at the end
    of the script.
   
   If there is open large object resource on the connection, do not
   close the connection before closing all large object resources.