exec不适用于Windows Server 2008 php

Question

i have a command below, if I run it through php file http://localhost/myfile.php

it will output the cmd but input_file.txt is not generated.

$cmd = "ffmpeg.exe -i C:\\ep-convert\\To_the_Beautiful_You_9.264 2> input_file.txt";
exec($cmd);
echo $cmd;

However if i copy the command output on the screen which is

ffmpeg.exe -i C:\ep-convert\To_the_Beautiful_You_9.264 2> input_file.txt

and i paste this in the console, its work.

The issue is if i run other exe file like mencoder or mplayer etc. the output is shown, however just specifically this ffmpeg.exe seems to not running with my exec()

what could have gone wrong and how to get exec work with the cmd above.

I am running window server 2008

Answer 1

This is most likely a file permissions problem. You may run this command from console just because you are running console as administrator. IIS has different user account. Accessing other files are restricted by default. You have to grant permission to that user for specific directories. You can simply right click folder then click properties. Go to the security tab and edit permissions.