PHP header_remove() Function

Remove specific header:

<?php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Cache-Control: no-cache");
header("Pragma: no-cache");

header_remove("Pragma");
?>

Definition and Usage

The header_remove() function removes an HTTP header previously set with the header() function.

header_remove( headername)

Parameter	Description
headername	Optional. Specifies a header name to be removed. If omitted, all previously set headers are removed

Return Value:	Nothing
PHP Version:	5.3+

Remove all previously set headers:

<?php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Cache-Control: no-cache");
header("Pragma: no-cache");

header_remove();
?>