Fatal Error: 'Call to undefined function mysql_connect()'
This topic provides information about the fatal error while calling function mysql_connect() received when trying to install GFI HelpDesk.
If you get an error like Fatal error: Call to undefined function mysql_connect() when trying to install GFI HelpDesk, it probably means that MySQL support has not been enabled for PHP on your server (that is, the PHP module php-mysql has not been installed).
You can confirm whether or not the MySQL module is present by accessing a phpinfo() page for the server. The MySQL module (if installed) appears in the phpinfo().