is_author() WP 1.0

Is the query for an existing author archive page?

If the $author parameter is specified, this function will additionally check if the query is for one of the authors specified.

No Hooks.

Return

true/false.

Usage

is_author( $author );

$author(mixed)

User ID, nickname, nicename, or array of User IDs, nicknames, and nicenames
Default: ''

Code of is_author: wp-includes/query.php ^{VER 4.9.8}

<?php
function is_author( $author = '' ) {
	global $wp_query;

	if ( ! isset( $wp_query ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
		return false;
	}

	return $wp_query->is_author( $author );
}

Related Functions

From tag: Conditional tags (page type and request)

More from tag: Conditional tags (all)

More from category: Queries

More from Template Tags: Main Functions