WordPress SVG Icon API

WordPress 7.1 provides public collection, registration, discovery, and rendering helpers for SVG icons. Use them instead of duplicating inline SVG strings across screens or inventing a second icon registry.

Register a collection before its icons

Register during init. Use a plugin-owned collection; core is reserved:

add_action( 'init', static function (): void {
    wp_register_icon_collection(
        'myplugin',
        array(
            'label'       => __( 'My Plugin', 'myplugin' ),
            'description' => __( 'Icons supplied by My Plugin.', 'myplugin' ),
        )
    );