检查浏览器HTML5与PHP的兼容性

Question

I want to use input types or other features from HTML5. But not all browsers support these HTML5 features.

How can I check if a user's browser is html5 compatible with PHP code only?.

By the way, I don't like modernizr. I have to figure out with PHP.

Example:

Html5 compatible browser:

<input type="date" value="" />

Html5 incompatible browser:

<input id="datepicker" type="text" value="" />

Answer 1

Can't feature detect with PHP only.

I'd re think you're dislike for Modernizr it's really quite awesome.