The possibilities to set a favicon are different. I think the best way is about a plugin. Also here give it more possibilities.
- You can use this plugin, that enhance the customizer to set a Favicon.
- Use this plugin, enhance more as only the favicon
-
Custom plugin, see the code hints below. The follow example set a favicon from the theme path of each blog. The path to the stylesheet (
get_stylesheet_directory*
) is the key here. You can also change this path to your requiremtents.add_action( 'wp_head', 'fb_set_favicon' ); /** * Set Favicon from theme directory */ function fb_set_favicon() { $stylesheet_dir_uri = get_stylesheet_directory_uri(); $stylesheet_dir = get_stylesheet_directory(); $favicon = '/favicon.ico'; $output=""; if ( file_exists( $stylesheet_dir . $favicon ) ) { $output .= '<link rel="shortcut icon" type="image/x-icon" href="' . esc_url( $stylesheet_dir_uri . $favicon ) . '" />'; $output .= '<style>'; } echo $output; }
-
It is also possible to set a favicon for each site in the network. But a switch about each site is non performant, is heavy for the system. You find a solution for this scenario in this class, that switch about all sites in the network and add a favicon to the admin bar, each site get a icon.