Re: how to execute Exe file in system

Please quote the relevant parts of the email you're replying to - your emails have massively diminished usefulness to the archives. On 17 Feb 2012, at 12:21, Negin Nickparsa wrote: > It generates NULL My bad, try this… $cmd = 'C:/Program\\ Files/GAMS23.7/gams.exe'.' '.escapeshellarg('C:/Program Files/GAMS23.7/trnsport_php.gms').' 2>&1'; If that still doesn't seem to work, I suggest you try just executing the command without arguments… $cmd = 'C:/Program\\ Files/GAMS23.7/gams.exe 2>&1'; Backticks execute a command and return the output: http://php.net/language.operators.execution -Stuart -- Stuart Dallas 3ft9 Ltd http://3ft9.com/