nocache_headers()

Set the headers to prevent caching for the different browsers.

Description

Different browsers support different nocache headers, so several headers must be sent so that all of them get the point that no caching should occur.

See also

More Information

Usage:
nocache_headers();

Source

File: wp-includes/functions.php 

function nocache_headers() {
	if ( headers_sent() ) {
		return;
	}

	$headers = wp_get_nocache_headers();

	unset( $headers['Last-Modified'] );

	header_remove( 'Last-Modified' );

	foreach ( $headers as $name => $field_value ) {
		header( "{$name}: {$field_value}" );
	}
}

Uses

Uses Description
wp-includes/functions.php: wp_get_nocache_headers()

Get the header information to prevent caching.

Used By

Used By Description
wp-includes/functions.php: _jsonp_wp_die_handler()

Kills WordPress execution and displays JSONP response with an error message.
wp-includes/functions.php: _xml_wp_die_handler()

Kills WordPress execution and displays XML response with an error message.
wp-includes/functions.php: _json_wp_die_handler()

Kills WordPress execution and displays JSON response with an error message.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::customize_preview_init()

Print JavaScript settings.
wp-includes/pluggable.php: auth_redirect()

Checks if a user is logged in, if not it redirects them to the login page.
wp-includes/class-wp.php: WP::handle_404()

Set the Headers for 404, if nothing is found for requested URL.
wp-includes/load.php: wp_not_installed()

Redirect to the installer if WordPress is not installed.
wp-includes/functions.php: _default_wp_die_handler()

Kills WordPress execution and displays HTML page with an error message.
wp-includes/functions.php: _ajax_wp_die_handler()

Kills WordPress execution and displays Ajax response with an error message.
wp-includes/functions.php: _xmlrpc_wp_die_handler()

Kills WordPress execution and displays XML response with an error message.

Changelog

Version Description
2.0.0 Introduced.

© 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/nocache_headers