header_remove

Remove previously set headers

void header_remove(stringnull $name = null)

Removes an HTTP header previously set using header.

name: The header name to be removed. When null, all previously set headers are removed.

Note: This parameter is case-insensitive.

No value is returned.

Version	Description
8.0.0	`name` is nullable now.

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.