I recently purchased CKEditor Font Awesome but it doesn't work in asp net pages: when i put an icon and switch in source mode ckeditor the icon disappear.
Is this plugin only for php?

Thank you

Hello,

PHP only adds server side rendering to your icon. If you see the icon at least once in the CKEditor you use default mode. So your server side language does not matter here.
Font Awesome plugin only inserts the icon into the CKEditor. If you write the tag manually and switch to Source and back, I guess you have the same behaviour. I can only recommend you to try adding this line to your CKEditor's 'config.js' to configure the editor

config.extraAllowedContent =true

Thank you for the answer.
If I write the tag manually from source and switch I don't see the icon, but if I switch again to source I see the tag.
Using the plugin (with your suggested configuration line) I obtain the same behavior.

I solved allowing empty span tag in ckeditor config

Hello,

I have added the support of this reconfiguring to the new version of Font Awesome pluign to make this configurating automatical.
The problem with removing Spans it usual in CKEditor and I will include this problem to CKEditor's FAQ: doksoft.com/blog/ckeditor-config-faq.html