Can I override/null out an HTTP response header field with a php script so that the field is not set? -

if server automatically sending expires http header response default, can override/null out php script expires header field not set?

yes can. cancel set expires header beingness sent:

header('expires:');

it work if no headers have been sent already, before echo , php starts sending info browser. might have utilize output buffering that.

and when upgrade php 5.3.* utilize header_remove('expires');.

php http-headers

Five