Facebook Connect with Modx Login (errors and general troubleshooting)

I've been following along with this website to implement Facebook Connect/Login on a Modx Revo site I'm helping someone with: http://edwardawebb.com/web-development/facebook-login-modx-sites

Right now I'm stuck getting this error:

Fatal error: Call to undefined method Facebook::getSession()

I've read that it could be an outdated PHP Client, though I've downloaded the one from here: https://github.com/facebook/php-sdk/, which I believe is the official place for it.

My snippets look identical to the ones on the website (only with my application ID's entered in the snippet call), and I'm not sure what else to try.

If there's a better way to implement this now, I'm open to that as well.

Thanks for the help. [ed. note: firebot6 last edited this post 14 years, 9 months ago.]

That error suggests that the Facebook class file is not being loaded, or the constructor for that class failed (or is not called before the getSession() call ).

There should be an "include" statement that pulls in the Facebook class file. If you change "include" to "require" you may see an error message telling you what file it's looking for and where it's looking.

That's getting me somewhere. It's trying to read the file from the core/cache/includes/elements folder, instead of reading the path from the root of the server.

I tried quite a few things to get the root path to show up instead, but none of them worked for me (mostly things from the comments on these pages http://php.net/manual/en/function.require-once.php and http://php.net/manual/en/function.getenv.php).

The files are located at www.example.com/facebook-connect/facebook.php
Or /home/server/public_html/facebook-connect/facebook.php

Here is the full snippet: http://pastebin.com/nd4QYkKQ

I kept the simple require path that I started with in there (and removed comments to save space).

You seem to end up helping me quite a bit! I do appreciate it.

I would move the file(s) to core/components/facebook/ and change the line to


Unless there are files that need to be accessed via URL. If that's the case, use MODX_ASSETS_URL.

I'm still getting the fatal error:

Fatal error: Call to undefined method Facebook::getSession() in /home/server/public_html/core/cache/includes/elements/modsnippet/80.include.cache.php on line 33

Once the website I was following along with is back up, I'm going to try starting over from the beginning again, and see if maybe I didn't make a mistake a long the way. Then I'll report back here.

Try deleting all files in the core/cache directory first and calling the snippet with the ID of 80 uncached.

I finally found something. It seems getSession is no longer supported in the new SDK versions (https://developers.facebook.com/blog/post/503).

I'll see if I can get the snippets updated. I'll come back once I've messed with it some more.

Changing all instance of $session to $user seems to have done the trick. Now I'm just having issues passing the information from Facebook onto Modx.

Once I figure that out, I'll post my full code here.

I'm going to cave and ask again. I'm in a little over my head.

In the same snippet: http://pastebin.com/SUUa8VYX

Most of the user data is being passed into the Remote Fields tab. Is there any way to have it fill in the main profile boxes, like it looks like it should from the snippet? I feel like I've asked about this before, but I can't find the thread again.

I will likely pull more information from Facebook eventually, but figured I would start with what's in there now.

I'm not sure what you're asking, since I've never used the snippet, but if you want things filled in and the snippet is at the top of the page, you can put placeholders on the page:



And set them in the code: