Disabled PHP functions:

apache_child_terminate
apache_setenv
define_syslog_variables
dl
exec
passthru
pcntl_exec
popen
posix_getpwuid
posix_kill
posix_mkfifo
posix_setegid
posix_seteuid
posix_setgid
posix_setpgid
posix_setsid
posix_setuid
posix_uname
proc_close
proc_get_status
proc_open
proc_terminate
shell_exec
show_source
syslog
system