WordPress at a glance
filter is not described

wp_die_ajax_handler filter-hook . WP 3.4.0

Filters the callback for killing WordPress execution for Ajax requests.

Usage

add_filter( 'wp_die_ajax_handler', 'filter_function_name_3382' );
function filter_function_name_3382( $function ){
	// filter...

	return $function;
}
$function(callable)
Callback function name.

Where the hook is called

wp_die()
wp-includes/functions.php 2693
$function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );

Where the hook is used (in WP core)

Does not used.