Conteg is used to negotiate the current HTTP Request response.
Most PHP-produced webpages are slower to arrive at the browser than they need to be. Conteg is designed to auto-allow full use of HTTP Content Negotiation. Even in it's most minimal form--3 lines of code--it will reduce server bandwidth + speed up document delivery three- to five-fold.
Load-balanced compressed output if the browser accepts it is auto-negotiated by default.
Conteg sends an Expires header of 1 hour by default. Cache-Control + Last-Modified headers can be added by means of setup switches, in which case Conteg will auto-negotiate If-Modified-Since + If-Unmodified-Since, auto-sending a `304 Not Modified' if appropriate.
If turned on via setup switches, Conteg will auto-negotiate If-None-Match, If-Match, If-Range + Range, auto-sending `406 Not Acceptable', `412 Precondition Failed', `416 Requested Range Not Satisfiable' or `206 Partial content' if appropriate.
If turned on via setup switches, Conteg will report these within the document headers. Class functions are provided to allow content negotiation outside the Class.
Conteg reports the Referer, browser User-Agent and Operating System.
The class can also serve custom error-pages, auto-fixed for serving to Microsoft Internet Explorer browsers (404 Not Found, 410 Gone, and other).
3 lines of code to implement on a page. All setup parameters have defaults. All defaults may be changed. < 0.002 secs in typical operation. In use on busy websites right now.