PHP cache control doesn't seem to work

Question

Please take a look at my website:vynora

It\'s not finished. I have put a PHP header in the top of my HTML page:

Answer 1

This may not work because there is possible whitespace before header(). Try it like this:

You should set the expired header as well, because old browsers do not understand "max-age".

Btw.: Your server is currently sending "max-age: 0".