Hello there and welcome to our forums.
You can use this as a tool to get answers to all your tinker related questions. Have a question? Ask it.......Have an answer? Answer it.
If you want more categories, please let me know.
Replies seem to work well. The forms for submitting comments, replies, and contact information do not seem to be standardized. For instance, you have home-brew check on the contact form, no check on comment form, and recaptcha on this form.
Ok....Thanks for pointing that out. I have changed the reCAPTCHA on the contact page and included reCAPTCHA on the blog comments. Now all submissions....forum, blog and contact all use the same method.
Well done. I was worried that you didn't sanitize server side.