gistfile1.txt

function dwqa_the_author( $display_name ) {
	global $post;

	if ( empty( $post ) ) {
		return $display_name;
	}
	if ( 'dwqa-answer' == $post->post_type || 'dwqa-question' == $post->post_type) {
		if ( dwqa_is_anonymous( $post->ID ) ) {
			$anonymous_name = get_post_meta( $post->ID, '_dwqa_anonymous_name', true );
			$display_name = $anonymous_name ? $anonymous_name : __( 'Anonymous', 'dwqa' );
		}
	}

	return $display_name;
}
add_filter( 'the_author', 'dwqa_the_author' );