is_year()

Function: Is the query for an existing year archive?

Source: wp-includes/query.php:676

is_404()

Function: Is the query a 404 (returns no results)?

Source: wp-includes/query.php:696

is_embed()

Function: Is the query for an embedded post?

Source: wp-includes/query.php:716

is_main_query()

Function: Is the query the main query?

Source: wp-includes/query.php:736

is_home()

Function: Determines if the query is for the blog homepage.

Source: wp-includes/query.php:432

is_month()

Function: Is the query for an existing month archive?

Source: wp-includes/query.php:452

is_page()

Function: Is the query for an existing single page?

Source: wp-includes/query.php:479

is_paged()

Function: Is the query for paged result and not for the first page?

Source: wp-includes/query.php:499

is_preview()

Function: Is the query for a post or page preview?

Source: wp-includes/query.php:519

is_robots()

Function: Is the query for the robots file?

Source: wp-includes/query.php:539