Here is a list of functions my provider disables for security purposes:
- exec
- dl
- show_source
- apache_note
- apache_setenv
- closelog
- debugger_off
- debugger_on
- define_syslog_variables
- escapeshellarg
- escapeshellcmd
- ini_restore
- openlog
- passthru
- pclose
- pcntl_exec
- popen
- proc_close
- proc_get_status
- proc_nice
- proc_open
- proc_terminate
- shell_exec
- syslog
- system
- url_exec
