How do i run s3cmd from PHP?

[psol]

How do i run s3cmd from PHP.What i am trying to do is backup certain files on s3 and will be storing its public url in database.$result = shell_exec("s3cmd put --skip-existing --acl-public /var/www/RD/temp.txt s3://xxxx/xxx/xx/");However when i run the .php file .. nothing happens..I have gone through the link mentioned below, but it didnt work for me.http://serverfault.com/questions/91...uns-from-command-line-but-not-from-php-scriptAbhishek Jain