This is a php program which can return the Bing`s background updated everyday.
When you deploy this page, you can get the newest background from bing which could be inserted directly into your web site.
Like this :
http://xxx/bing.php // will return a 1366x768 JPG
or
http://xxx/bing.php?s=big // will return a 1920x1080 JPG
Just enjoy it.