WordPress 4.2.1 gravatar头像无法显示

	if ( $email_hash ) {
		$args['found_avatar'] = true;
		$gravatar_server = hexdec( $email_hash[0] ) % 3;
	} else {
		$gravatar_server = rand( 0, 2 );
	}

	$url_args = array(
		's' => $args['size'],
		'd' => $args['default'],
		'f' => $args['force_default'] ? 'y' : false,
		'r' => $args['rating'],
	);

	$url = sprintf( 'http://%d.gravatar.com/avatar/%s', $gravatar_server, $email_hash );

	$url = add_query_arg(
		rawurlencode_deep( array_filter( $url_args ) ),
		set_url_scheme( $url, $args['scheme'] )
	);

$url = sprintf( 'http://1.gravatar.com/avatar/%s', $email_hash );