@Markus
:) firstly ,thanks for your help!
1 there are no errros , and $cvs shows empty! ,if i use system('cvs udpate -d',$return), $returns echos 1, accord to the php manual Returns the last line of the command output on success, and FALSE on failure
cvs command dosent be executed in php,why? other command like dir ls etc can run successful ................................