Disabled functions, values for PHP variable disable_functions

The disable_functions Directive is used to disable unnecessary functions. With its help, you can disable features such as shell_exec and phpinfo, which are primarily targeted by attackers in the primary analysis of the site.

To protect your sites on virtual hosting, the following PHP features are disabled by default:

exec, passthru, system, shell_exec, popen, proc_open, pcntl_exec, putenv, link, symlink