Well I'm having a bit of an issue, I have an application that uses DOMDocument to display some content but it is removing some code that is needed for FBML and a Google +1 button to display.
For example, Facebook's like button is <fb:like>, it is removing fb: from the string. Google's +1 button is like <g:plusone> and it's removing g:.
Is there any way to make it not remove that part of the code?
You can solve both issues.
With Facebook like button, you will want to use the HTML5 version. See: https://developers.facebook.com/docs/reference/plugins/like/
ex: <div class="fb-like" data-send="true" data-width="450" data-show-faces="true"></div>
With Google's Plus one you can use the HTML5 version as well. See: https://developers.google.com/+/plugins/+1button/
ex: <div class="g-plusone" data-size="tall" ... ></div>