wp_get_nocache_headers

Get the header information to prevent caching.

Description

(array) wp_get_nocache_headers(); 

The several different headers cover the different ways cache prevention is handled by different browsers

Returns (array)

The associative array of header names and field values.

Usage

  1. if ( !function_exists( 'wp_get_nocache_headers' ) ) { 
  2.     require_once ABSPATH . WPINC . '/functions.php'; 
  3. } 
  4.  
  5.   
  6. // NOTICE! Understand what this does before running. 
  7. $result = wp_get_nocache_headers(); 
  8.     

Defined (1)

The function is defined in the following location(s).

/wp-includes/functions.php  
  1. function wp_get_nocache_headers() { 
  2.     $headers = array( 
  3.         'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',  
  4.         'Cache-Control' => 'no-cache, must-revalidate, max-age=0',  
  5.  ); 
  6.  
  7.     if ( function_exists('apply_filters') ) { 
  8.         /** 
  9.          * Filters the cache-controlling headers. 
  10.          * 
  11.          * @since 2.8.0 
  12.          * 
  13.          * @see wp_get_nocache_headers() 
  14.          * 
  15.          * @param array $headers { 
  16.          *     Header names and field values. 
  17.          * 
  18.          *     @type string $Expires       Expires header. 
  19.          *     @type string $Cache-Control Cache-Control header. 
  20.          * } 
  21.          */ 
  22.         $headers = (array) apply_filters( 'nocache_headers', $headers ); 
  23.     } 
  24.     $headers['Last-Modified'] = false; 
  25.     return $headers; 
  26. }