... PEAR, 285 – 288 classes, 286 creating monthly calendar, 286 – 288 date and time classes, 286 decorator classes, 286 installing, 285 isValid method, 288 tabular date classes, 286 validating dates and ... 682 , 685 pg_dump command, 605 upgrading PostgreSQL, 610 pg_dumpall command, 607 installing PostgreSQL from source, 583 PGPORT variable, psql, 615 pgsql class see PostgreSQL database class pgSQL ... 687 – 688 PostgreSQL, 581 – 589 inheritance, OOP, 134, 161–165 on Linux and Unix, 582 – 585 abstract classes, 1 68 on Windows 2000/XP/2003, 585 – 589 class inheritance, 162 on Windows 95/ 98/ ME, 589 constructors...