Fatal error: Call to undefined function pg_connect()

Question

I am trying to connect to my database (remote server) which has PostgreSQL installed in it. My PHP code is trying to connect to the database using pg_connect(), but I get th

Answer 1

On Gentoo, use USE flag postgres in /etc/portage/make.conf and re emerge "emerge php"

Answer 2

1. Add 'PHPIniDir "C:/php"' into the httpd.conf file.(provided you have your PHP saved in C:, or else give the location where PHP is saved.)
2. Uncomment following 'extension=php_pgsql.dll' in php.ini file
3. Uncomment ';extension_dir = "ext"' in php.ini directory

Answer 3

I encountered this error and it ended up being related to how PHP's extension_dir was loading.

If upon printing out phpinfo() you find that under the PDO header PDO drivers is set to no value, you may want to check that you are successfully loading your extension directory as detailed in this post:

https://stackoverflow.com/a/14786808/2578505

Answer 4

You need to install the php-pgsql package or whatever it's called for your platform. Which I don't think you said by the way.

On Ubuntu and Debian:

sudo apt-get install php5-pgsql

Answer 5

I also had this problem on OSX. The solution was uncommenting the extension = pgsql.so in php.ini.default and deleting the .default suffix, since the file php.ini was not there.

If you are using XAMPP, the php.ini file resides in /XAMPP/xampfiles/etc

Answer 6

For php 5.4 on Centos 6.10, we include these lines in php.ini

extension=/opt/remi/php54/root/usr/lib64/php/modules/pdo.so
extension=/opt/remi/php54/root/usr/lib64/php/modules/pgsql.so
extension=/opt/remi/php54/root/usr/lib64/php/modules/pdo_pgsql.so

It works.