exit_on_http_head

Filters whether to allow 'HEAD' requests to generate content.

Description

apply_filters( 'exit_on_http_head', (bool) $true ); 

Provides a significant performance bump by exiting before the page content loads for HEAD requests. See #14348.

Parameters (1)

0. $true (bool) => true
Whether to exit without generating any content for HEAD requests. Default true.

Usage

To run the hook, copy the example below.
  1. $true = apply_filters( 'exit_on_http_head', $true ); 
  2.  
  3. if ( !empty( $true ) ) { 
  4.  
  5. // everything has led up to this point... 
  6.  
  7.  
The following example is for adding a hook callback.
  1. // define the exit_on_http_head callback 
  2. function filter_exit_on_http_head( $true ) { 
  3. // make filter magic happen here... 
  4. return $true
  5. }; 
  6.  
  7. // add the filter 
  8. add_filter( 'exit_on_http_head', 'filter_exit_on_http_head', 10, 1 ); 
To remove a hook callback, use the example below.
  1. // remove the filter 
  2. remove_filter( 'exit_on_http_head', 'filter_exit_on_http_head', 10, 1 ); 

Defined (1)

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

/wp-includes/template-loader.php  
  1. if ( 'HEAD' === $_SERVER['REQUEST_METHOD'] && apply_filters( 'exit_on_http_head', true ) )