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wp_get_nocache_headers › WordPress Function

Since2.8.0
Deprecatedn/a
› wp_get_nocache_headers ( No parameters )
Returns:
  • (array) The associative array of header names and field values.
Defined at:
Codex:
Change Log:
  • 6.3.0
  • 6.8.0

Gets the HTTP header information to prevent caching.

The several different headers cover the different ways cache prevention is handled by different browsers or intermediate caches such as proxy servers.


Related Functions: nocache_headers, wp_get_http_headers, wp_cache_decr, _get_non_cached_ids, wp_get_schedules

Source 

function wp_get_nocache_headers() {
	$cache_control = 'no-cache, must-revalidate, max-age=0, no-store, private';

	$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;
}