header_remove

(PHP 5 >= 5.3.0, PHP 7)

header_remove — Remove previously set headers

header_remove ([ string $name ] ) : void

Removes an HTTP header previously set using header().

name: The header name to be removed.

Note: This parameter is case-insensitive.

No value is returned.

Example #1 Unsetting specific header.

<?php
header("X-Foo: Bar");
header("X-Bar: Baz");
header_remove("X-Foo"); 
?>

The above example will output something similar to:

X-Bar: Baz

Example #2 Unsetting all previously set headers.

<?php
header("X-Foo: Bar");
header("X-Bar: Baz");
header_remove(); 
?>

The above example will output something similar to:

Caution

This function will remove all headers set by PHP, including cookies, session and the X-Powered-By headers.

Note:

Headers will only be accessible and output when a SAPI that supports them is in use.