wp_get_nocache_headers(): array
Gets the HTTP header information to prevent caching.
Description
The several different headers cover the different ways cache prevention is handled by different browsers.
Return
array The associative array of header names and field values.
Source
File: wp-includes/functions.php
.
View all references
function wp_get_nocache_headers() {
$cache_control = ( function_exists( 'is_user_logged_in' ) && is_user_logged_in() )
? 'no-cache, must-revalidate, max-age=0, no-store, private'
: 'no-cache, must-revalidate, max-age=0';
$headers = array(
'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
'Cache-Control' => $cache_control,
);
if ( function_exists( 'apply_filters' ) ) {
/**
* Filters the cache-controlling HTTP headers that are used to prevent caching.
*
* @since 2.8.0
*
* @see wp_get_nocache_headers()
*
* @param array $headers Header names and field values.
*/
$headers = (array) apply_filters( 'nocache_headers', $headers );
}
$headers['Last-Modified'] = false;
return $headers;
}
Hooks
-
apply_filters( 'nocache_headers',
array $headers ) -
Filters the cache-controlling HTTP headers that are used to prevent caching.
Changelog
Version | Description |
---|---|
6.3.0 | The Cache-Control header for logged in users now includes the no-store and private directives. |
2.8.0 | Introduced. |