PHP Canvas

This is a very small example of using PHP with Force.com Canvas.

PHP with the Canvas Javascript SDK

Canvas provides a JavaScript SDK if you want to make only minimal changes or installation in order to get up and running. Effectively, this means you only need PHP to decode the incoming SignedRequest, and then hand the information to the client for JavaScript to use. From there, the SDK can use window.postMessage (or the equivalent) to avoid any potential cross-domain issues, allowing you to make RESTful calls back to the Force.com platform via JavaScript.

index.php provides and example of that.

PHP with httpful

Or, if you want to keep the callbacks in PHP (perhaps for tighter integration with existing code), you can use a library like httpful to easily make REST callouts. Normally httpful is distributed via a phar, but is included here as Heroku (which is optional to use with Canvas) does not support phar's normally.

index-httpful.php is an example of that.

Note

Updated to Spring '13.

If you want to try these apps in your Canvas, here are the installation links:

https://login.salesforce.com/services/forceconnectedapps/josh2013/Josh https://login.salesforce.com/services/forceconnectedapps/josh2013/Josh2

Note: As of recently, you'll need to modify the app permissions to admin configured users instead of all users. You can then add the appropriate profiles to the app for use.