I'm setting up a system (for development) and get the following error: Fatal error: Call to undefined function: pg_connect() in /var/www/htdocs/test_pg.php on line 3 PHP 4.3.4 was configured with this: ./configure --with-pgsql --with-apxs --with-mysql --with-pear AFAIK no errors in ./configure ---> make install steps. I would like suggestions on the things to check, or procedures to help debug this. I'm not very experienced with Linux, Apache, PHP, or Postgres. I just setup this system so any of the four components above could be faulty. I went through php.ini and httpd.conf per the install guide in the php source. Apache serves up it's default start page, phpinfo() works, and I can create a db with psql. The distribution is Slackware 9.1. Thanks in advance.