apache user not able to run sox command

Question

I have a test script which does following:

$a = shell_exec("sox /var/www/html/media/file-all.gsm -r 8000 -c 1  -e signed-integer /var/www/html/wav-files/file-all.wav");

• script runs as apache user
• source and destination both files and folders have 777 permission
• tried changing the group and ownership to apache user too

Still does not work.

Any help appreciated.

Thanks

Answer 1

One possibility is, that the sox command is not in the PATH used by apache user.

Specify the absolute path to sox in your shell_exec() call.