is_archive()判断是否是存档页面

<?php is_archive(); ?>

/**
 * Is the query for an existing archive page?
 *
 * Month, Year, Category, Author, Post Type archive...
 *
 * @since 1.5.0
 *
 * @global WP_Query $wp_query Global WP_Query instance.
 *
 * @return bool
 */
function is_archive() {
	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_archive();
}

<?php
if(is_archive()){
    echo "我只会在存档页面";
}else
{
    echo "我只显示在非存档页面";
}
?>

<?php
if(is_archive()){
    echo "我是存档页面，你是谁？";
}
?>