emoji_svg_url filter-hook . WP 1.0

This filter is documented in wp-includes/formatting.php

Usage

add_filter( 'emoji_svg_url', 'filter_function_name_3878' );
function filter_function_name_3878( $url ){
	// filter...

	return $url;
}

$url

-

Where the hook is called

$hints['dns-prefetch'][] = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/13.0.0/svg/' );

'svgUrl'  => apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/13.1.0/svg/' ),

Where in WP core the hook is used WordPress