php headers

[jithavijayan]

// Date in the past

header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

// always modified

header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

// HTTP/1.1

header("Cache-Control: no-store, no-cache, must-revalidate");

header("Cache-Control: post-check=0, pre-check=0", false);

// HTTP/1.0

header("Pragma: no-cache");

//XML Header

header("content-type:text/xml");

 

Don't know what this code means and where/why to use it. Can someone help?

 

[MasterACE14]

there's alot of different uses and reasons.

 

look up the header(); function in the PHP manual here

[wildteen88]

That code is used to prevent a web browser from caching the requested page.

 

In order to understanding the code, you'll need to read up on HTTP Headers.

[DarkWater]

Actually, wildteen, it's not all about that.  There's a random XML header in there. =/

[wildteen88]

Actually, wildteen, it's not all about that.  There's a random XML header in there. =/

That just tells the browser what data type to expect, in this case XML.

[DarkWater]

I know that, but I didn't think he did.  =P  I'd hate to see the post about how his thing was being parsed as XML because he threw that line in for cache control.

 

Edit: Yeah, I meant XML instead of HTML. =P  Fixed.

[wildteen88]

Thats why I suggested jithavijayan to read up on HTTP Headers, so s/he knew what the commands meant.