How to Disable some dangerous PHP Function
PHP is an open source and powerful server side scripting language, can run in Windows, Linux, Mac and other operating system. Some very useful functions are becomes dangerous function because hackers easily hacked websites in hosting servers..
If you want to disable PHP function add these function names in php.ini,
Most probably will get PHP configure file from /etc/php.ini directory or may also get in /usr/local/lib/php.ini, If you could not find give the below command,
php: /usr/bin/php /usr/lib64/php /etc/php.d /etc/php.ini /usr/include/php /usr/share/php /usr/share/man/man1/php.1.gz
For example disabled few fuctions,
disable_functions = "apache_setenv, escapeshellarg, escapeshellcmd, exec, ftp_put, ftp_get, inject_code, passthru, popen, proc_open, proc_terminate, symlinked, symlink, show_source, shell_exec, system"