Php login issue

[nyarkiee]

Yes it was installed on an ubuntu server not kali. I just view the web application from a kali vm on the same network.
The issue still persists
Kindly assist

[radiocooke]

Same issue here, Installed on a fresh install of Ubuntu 22.04.5 yesterday, wiped the system completely and repeated the step-by-step process in the documentation just to be sure I did not miss any steps. I got to exactly the same error both times.

[Krook9d]

Same issue here, Installed on a fresh install of Ubuntu 22.04.5 yesterday, wiped the system completely and repeated the step-by-step process in the documentation just to be sure I did not miss any steps. I got to exactly the same error both times.

It looks like the web server can’t find the pg_connect() function, which usually means the PostgreSQL extension for PHP isn’t loaded. It’s working fine on my side, so I’d like to check a few things on your setup.

Could you please run these commands on the server and share the output?

php -v
php -m | grep -i -E 'pgsql|pdo_pgsql'
dpkg -l | grep -E 'php|pgsql' | grep -i pgsql
PHPVER=$(php -r 'echo PHP_MAJOR_VERSION.".".PHP_MINOR_VERSION;')
ls -l /etc/php/$PHPVER/apache2/conf.d/pgsql.ini 2>/dev/null
ls -l /etc/php/$PHPVER/mods-available/pgsql.ini
apachectl -M | grep -i php
sudo tail -n 50 /var/log/apache2/error.log

[nyarkiee]

I have done all that.
Same old error

[radiocooke]

I have done all that. Same old error

I get more or less the same error

[Krook9d]

I have done all that.
Same old error

The command I provided is for collecting diagnostic information (logs), not for fixing the issue. Could you run it and share the output ?

[radiocooke]

Here is the content of apache2/error.log as well as what was returned when running the commands via putty. Hopefully this is helpful.

From apache2/error.log

[Sat Aug 16 13:09:28.960257 2025] [mpm_prefork:notice] [pid 23476] AH00163: Apache/2.4.52 (Ubuntu) mod_ldap_userdir/1.1.19 configured -- resuming normal operations
[Sat Aug 16 13:09:28.960308 2025] [core:notice] [pid 23476] AH00094: Command line: '/usr/sbin/apache2'
[Sat Aug 16 13:09:34.521700 2025] [mpm_prefork:notice] [pid 23476] AH00170: caught SIGWINCH, shutting down gracefully
[Sat Aug 16 13:09:34.590577 2025] [mpm_prefork:notice] [pid 25199] AH00163: Apache/2.4.52 (Ubuntu) mod_ldap_userdir/1.1.19 configured -- resuming normal operations
[Sat Aug 16 13:09:34.590623 2025] [core:notice] [pid 25199] AH00094: Command line: '/usr/sbin/apache2'
[Sat Aug 16 18:05:53.741087 2025] [php:error] [pid 25205] [client 192.168.1.157:53340] PHP Fatal error: Uncaught Error: Call to undefined function pg_connect() in /var/www/html/authenticate.php:19\nStack trace:\n#0 {main}\n thrown in /var/www/html/authenticate.php on line 19, referer: http://192.168.1.149/connexion.html
[Sat Aug 16 18:13:38.258755 2025] [php:error] [pid 49234] [client 192.168.1.157:53485] PHP Fatal error: Uncaught Error: Call to undefined function pg_connect() in /var/www/html/authenticate.php:19\nStack trace:\n#0 {main}\n thrown in /var/www/html/authenticate.php on line 19, referer: http://192.168.1.149/connexion.html

From Putty:

plabadmin@localhost:$ php -v
php -m | grep -i -E 'pgsql|pdo_pgsql'
dpkg -l | grep -E 'php|pgsql' | grep -i pgsql
PHPVER=$(php -r 'echo PHP_MAJOR_VERSION.".".PHP_MINOR_VERSION;')
ls -l /etc/php/$PHPVER/apache2/conf.d/pgsql.ini 2>/dev/null
ls -l /etc/php/$PHPVER/mods-available/pgsql.ini
apachectl -M | grep -i php
sudo tail -n 50 /var/log/apache2/error.log
PHP 8.1.2-1ubuntu2.22 (cli) (built: Jul 15 2025 12:11:22) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
with Zend OPcache v8.1.2-1ubuntu2.22, Copyright (c), by Zend Technologies
ls: cannot access '/etc/php/8.1/mods-available/pgsql.ini': No such file or directory
php_module (shared)
[sudo] password for plabadmin:
[Sat Aug 16 13:09:28.960257 2025] [mpm_prefork:notice] [pid 23476] AH00163: Apache/2.4.52 (Ubuntu) mod_ldap_userdir/1.1.19 configured -- resuming normal operations
[Sat Aug 16 13:09:28.960308 2025] [core:notice] [pid 23476] AH00094: Command line: '/usr/sbin/apache2'
[Sat Aug 16 13:09:34.521700 2025] [mpm_prefork:notice] [pid 23476] AH00170: caught SIGWINCH, shutting down gracefully
[Sat Aug 16 13:09:34.590577 2025] [mpm_prefork:notice] [pid 25199] AH00163: Apache/2.4.52 (Ubuntu) mod_ldap_userdir/1.1.19 configured -- resuming normal operations
[Sat Aug 16 13:09:34.590623 2025] [core:notice] [pid 25199] AH00094: Command line: '/usr/sbin/apache2'
[Sat Aug 16 18:05:53.741087 2025] [php:error] [pid 25205] [client 192.168.1.157:53340] PHP Fatal error: Uncaught Error: Call to undefined function pg_connect() in /var/www/html/authenticate.php:19\nStack trace:\n#0 {main}\n thrown in /var/www/html/authenticate.php on line 19, referer: http://192.168.1.149/connexion.html
plabadmin@localhost:$

[Krook9d]

From what I see, the PostgreSQL extension for PHP isn’t installed on your server, that’s why pg_connect() is missing.

Can you try running these commands one by one?

sudo apt update
sudo apt install -y php-pgsql php-pdo-pgsql || sudo apt install -y php8.1-pgsql
sudo phpenmod pgsql pdo_pgsql
sudo systemctl restart apache2

Then check if it’s loaded with:

php -m | grep pgsql

[radiocooke]

Output from commands

plabadmin@localhost:$ sudo apt update
[sudo] password for plabadmin:
Get:1 http://security.ubuntu.com/ubuntu jammy-security InRelease [129 kB]
Hit:2 http://us.archive.ubuntu.com/ubuntu jammy InRelease
Get:3 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease [128 kB]
Hit:4 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease
Get:5 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages [2,804 kB]
Hit:6 https://ppa.launchpadcontent.net/ansible/ansible/ubuntu jammy InRelease
Get:7 http://us.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 Packages [1,226 kB]
Fetched 4,287 kB in 1s (4,188 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.
plabadmin@localhost:$ sudo apt install -y php-pgsql php-pdo-pgsql || sudo apt install -y php8.1-pgsql
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'php8.1-pgsql' instead of 'php-pdo-pgsql'
The following packages were automatically installed and are no longer required:
libmodule-find-perl libmodule-scandeps-perl libproc-processtable-perl libsort-naturally-perl libterm-readkey-perl
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
libpq5
The following NEW packages will be installed:
libpq5 php-pgsql php8.1-pgsql
0 upgraded, 3 newly installed, 0 to remove and 1 not upgraded.
Need to get 218 kB of archives.
After this operation, 678 kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 libpq5 amd64 14.18-0ubuntu0.22.04.1 [152 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 php8.1-pgsql amd64 8.1.2-1ubuntu2.22 [64.3 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 php-pgsql all 2:8.1+92ubuntu1 [1,838 B]
Fetched 218 kB in 0s (2,026 kB/s)
Selecting previously unselected package libpq5:amd64.
(Reading database ... 140867 files and directories currently installed.)
Preparing to unpack .../libpq5_14.18-0ubuntu0.22.04.1_amd64.deb ...
Unpacking libpq5:amd64 (14.18-0ubuntu0.22.04.1) ...
Selecting previously unselected package php8.1-pgsql.
Preparing to unpack .../php8.1-pgsql_8.1.2-1ubuntu2.22_amd64.deb ...
Unpacking php8.1-pgsql (8.1.2-1ubuntu2.22) ...
Selecting previously unselected package php-pgsql.
Preparing to unpack .../php-pgsql_2%3a8.1+92ubuntu1_all.deb ...
Unpacking php-pgsql (2:8.1+92ubuntu1) ...
Setting up libpq5:amd64 (14.18-0ubuntu0.22.04.1) ...
Setting up php8.1-pgsql (8.1.2-1ubuntu2.22) ...

Creating config file /etc/php/8.1/mods-available/pgsql.ini with new version

Creating config file /etc/php/8.1/mods-available/pdo_pgsql.ini with new version
Setting up php-pgsql (2:8.1+92ubuntu1) ...
Processing triggers for libc-bin (2.35-0ubuntu3.10) ...
Processing triggers for libapache2-mod-php8.1 (8.1.2-1ubuntu2.22) ...
Processing triggers for php8.1-cli (8.1.2-1ubuntu2.22) ...
plabadmin@localhost:$ sudo phpenmod pgsql pdo_pgsql
plabadmin@localhost:$ sudo systemctl restart apache2
plabadmin@localhost:$ php -m | grep pgsql
pdo_pgsql
pgsql
plabadmin@localhost:$

[radiocooke]

Output from commands

plabadmin@localhost:$ sudo apt update [sudo] password for plabadmin: Get:1 http://security.ubuntu.com/ubuntu jammy-security InRelease [129 kB] Hit:2 http://us.archive.ubuntu.com/ubuntu jammy InRelease Get:3 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease [128 kB] Hit:4 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease Get:5 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages [2,804 kB] Hit:6 https://ppa.launchpadcontent.net/ansible/ansible/ubuntu jammy InRelease Get:7 http://us.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 Packages [1,226 kB] Fetched 4,287 kB in 1s (4,188 kB/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done 1 package can be upgraded. Run 'apt list --upgradable' to see it. plabadmin@localhost:$ sudo apt install -y php-pgsql php-pdo-pgsql || sudo apt install -y php8.1-pgsql Reading package lists... Done Building dependency tree... Done Reading state information... Done Note, selecting 'php8.1-pgsql' instead of 'php-pdo-pgsql' The following packages were automatically installed and are no longer required: libmodule-find-perl libmodule-scandeps-perl libproc-processtable-perl libsort-naturally-perl libterm-readkey-perl Use 'sudo apt autoremove' to remove them. The following additional packages will be installed: libpq5 The following NEW packages will be installed: libpq5 php-pgsql php8.1-pgsql 0 upgraded, 3 newly installed, 0 to remove and 1 not upgraded. Need to get 218 kB of archives. After this operation, 678 kB of additional disk space will be used. Get:1 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 libpq5 amd64 14.18-0ubuntu0.22.04.1 [152 kB] Get:2 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 php8.1-pgsql amd64 8.1.2-1ubuntu2.22 [64.3 kB] Get:3 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 php-pgsql all 2:8.1+92ubuntu1 [1,838 B] Fetched 218 kB in 0s (2,026 kB/s) Selecting previously unselected package libpq5:amd64. (Reading database ... 140867 files and directories currently installed.) Preparing to unpack .../libpq5_14.18-0ubuntu0.22.04.1_amd64.deb ... Unpacking libpq5:amd64 (14.18-0ubuntu0.22.04.1) ... Selecting previously unselected package php8.1-pgsql. Preparing to unpack .../php8.1-pgsql_8.1.2-1ubuntu2.22_amd64.deb ... Unpacking php8.1-pgsql (8.1.2-1ubuntu2.22) ... Selecting previously unselected package php-pgsql. Preparing to unpack .../php-pgsql_2%3a8.1+92ubuntu1_all.deb ... Unpacking php-pgsql (2:8.1+92ubuntu1) ... Setting up libpq5:amd64 (14.18-0ubuntu0.22.04.1) ... Setting up php8.1-pgsql (8.1.2-1ubuntu2.22) ...

Creating config file /etc/php/8.1/mods-available/pgsql.ini with new version

Creating config file /etc/php/8.1/mods-available/pdo_pgsql.ini with new version Setting up php-pgsql (2:8.1+92ubuntu1) ... Processing triggers for libc-bin (2.35-0ubuntu3.10) ... Processing triggers for libapache2-mod-php8.1 (8.1.2-1ubuntu2.22) ... Processing triggers for php8.1-cli (8.1.2-1ubuntu2.22) ... plabadmin@localhost:$ sudo phpenmod pgsql pdo_pgsql plabadmin@localhost:$ sudo systemctl restart apache2 plabadmin@localhost:$ php -m | grep pgsql pdo_pgsql pgsql plabadmin@localhost:$

Please let me know if this output is helpful or if you need anything further. I'd also be interested to understand what I did to prevent it form operating normally. AFAIK I followed the directions exactly, thank you.

[radiocooke]

Any further guidance on how to resolve this?