Is there a universal border-radius using php, js, jquery?

Question

PHP

I would like to forget once and for all the problems with rounding corners. I make constant css crutches for the border-radius, then one does not round off, then the other, and cross-browser compatibility does not always work, in general, guys are in trouble ...
Throw pliz methods php, js , jquery , something to round and cut everything to hell from the first approach .

(I'll clarify the question a little, problems with rounding the table when #table border-collapse: collapse; does not round thead, etc.)

Answer 1

See how the site is made vbochonke.ru is made (including IE 8,9,11)

Answer 2

Apart from cross-browser compatibility (early ie in particular), can you give an example when something is not rounded off for you?