header_remove

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

header_removeRemove previously set headers

Description

header_remove(?string $name = null): void

Removes an HTTP header previously set using header().

Parameters

name

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

Note: This parameter is case-insensitive.

Return Values

No value is returned.

Changelog

Version Description
8.0.0 name is nullable now.

Examples

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:


Notes

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.

See Also

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