Sorry mate I think I'm stumped... Have you tried the same code on a different server... you could download this to your PC if you don't have a free server (www.easyphp.org).
That may help with diagnosing
Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption. Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern: