wphooks.info - exit_on_http_head

exit_on_http_head

The hook occurs in the following file:

wp-includes/template-loader.php:
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/**
 * Filters whether to allow 'HEAD' requests to generate content.
 *
 * Provides a significant performance bump by exiting before the page
 * content loads for 'HEAD' requests. See #14348.
 *
 * @since 3.5.0
 *
 * @param bool $exit Whether to exit without generating any content for 'HEAD' requests. Default true.
 */
if ( 'HEAD' === $_SERVER['REQUEST_METHOD'] && apply_filters( 'exit_on_http_head', true ) )
	exit();

// Process feeds and trackbacks even if not using themes.
if ( is_robots() ) :
	/**
	 * Fired when the template loader determines a robots.txt request.
	 *
	 * @since 2.1.0
	 */