[PHP] is their a way to run a command as root ???

Is their a way to run a command as root..or another user.. I know their are a log of security issues with allowing this.. I will tighten down security after I get it to work. He is what I am trying to do. I have squid & squid guard set up.. in squids redirect url.. (on the same box).. I would l

[PHP] php & snmp

Hello... Could some one please direct me in the right direction. I am trying to get an snmpwalk on an snmp device.. I have set up the community and IP correctly.. I can do a manually by doing the fallowing: snmpwalk 126.4.202.157 public from a terminal,,, and I do get some responses