This is just a demonstration of how you can use this library
Here you can find a basic form that requests the shot.php file to screenshot the websites.
You can directly render the taken screen-shot with the shot.php file
You can render any link by passing it as url parameter: shot.php?url=google.com
You can specify height and width: shot.php?url=google.com&w=300&h=100
If you want to crop/clip the screen shot, you can do so like this: shot.php?url=google.com&w=800&h=600&clipw=800&cliph=600
You can also set a user agent string to be used on the request: shot.php?url=google.com&user-agent=some-random-user-agent-string
Note: You should urlencode the values in case there is any space or tricky character.
Here you can se an example on how to delete the job files that are generated automatically.