Forbidden PHP function for Server Security

forbidden-php-exec

system, show_source, symlink, exec, dl, shell_exec, passthru, escapeshellarg,escapeshellcmd,apache_child_terminate,apache_setenv,define_syslog_variables,fp,fput,ftp_connect,ftp_exec,ftp_get, ftp_login,ftp_nb_fput,ftp_put,ftp_raw,ftp_rawlist,highlight_file,ini_alter,ini_get_all,ini_restore, inject_code, mysql_pconnect, openlog, phpAds_remoteInfo, phpAds_XmlRpc,phpAds_xmlrpcDecode, phpAds_xmlrpcEncode, popen, posix_getpwuid, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid,posix_setuid,posix_uname, syslog,xmlrpc_entity_decode