I have a script polling a Beanstalkd queue and needed to put it into the background, and bring it to the front whilst debugging it.
screen to run the job in a virtual terminal and run the command and send it to the background with '&':
php worker.php &
This will start the script and push it to the background.
To get the process back, simply run the
$ fg php worker.php
The problem is that I can't now send the process to the background again with the
fg command. Instead you can use
ctrl-z (control + z) to send it to the background. The first time you ctrl-z it will suspend the process. Hit
bg again to push it to the background and resume it.