get_query_var( string $var, mixed $default = '' )

Retrieve variable in the WP_Query class.

Parameters

$var

(string) (Required) The variable key to retrieve.

$default

(mixed) (Optional) Value to return if the query variable is not set.

Default value: ''

Return

(mixed) Contents of the query variable.

Source

File: wp-includes/query.php 

function get_query_var( $var, $default = '' ) {
	global $wp_query;
	return $wp_query->get( $var, $default );
}

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Related

Uses

Uses
Uses Description
wp-includes/class-wp-query.php: WP_Query::get()

Retrieve query variable.

Used By

Used By
Used By Description
wp-includes/general-template.php: get_search_query()

Retrieves the contents of the search ClassicPress query variable.
wp-includes/general-template.php: paginate_links()

Retrieve paginated link for archive post pages.
wp-includes/general-template.php: feed_links_extra()

Display the links to the extra feeds such as category feeds.
wp-includes/general-template.php: get_the_post_type_description()

Retrieves the description for a post type archive.
wp-includes/general-template.php: wp_title()

Display or retrieve page title for all areas of blog.
wp-includes/general-template.php: post_type_archive_title()

Display or retrieve title for a post type archive.
wp-includes/general-template.php: single_month_title()

Display or retrieve page title for post archive based on date.
wp-includes/template.php: get_page_template()

Retrieve path of page template in current or parent template.
wp-includes/template.php: get_archive_template()

Retrieve path of archive template in current or parent template.
wp-includes/template.php: get_post_type_archive_template()

Retrieve path of post type archive template in current or parent template.
wp-includes/query.php: wp_old_slug_redirect()

Redirect old slugs to the correct permalink.
wp-includes/query.php: _find_post_by_old_slug()

Find the post ID for redirecting an old slug.
wp-includes/query.php: _find_post_by_old_date()

Find the post ID for redirecting an old date.
wp-includes/comment.php: get_page_of_comment()

Calculate what page number a comment will appear on for comment paging.
wp-includes/comment.php: get_comment_pages_count()

Calculate the total number of comment pages.
wp-includes/link-template.php: wp_get_canonical_url()

Returns the canonical URL for a post.
wp-includes/link-template.php: get_next_comments_link()

Retrieves the link to the next comments page.
wp-includes/link-template.php: get_previous_comments_link()

Retrieves the link to the previous comments page.
wp-includes/link-template.php: paginate_comments_links()

Displays or retrieves pagination links for the comments on the current post.
wp-includes/link-template.php: get_posts_nav_link()

Retrieves the post pages link navigation for previous and next pages.
wp-includes/user.php: wp_dropdown_users()

Create dropdown HTML content of users.
wp-includes/category-template.php: wp_dropdown_categories()

Display or retrieve the HTML dropdown list of categories.
wp-includes/post-template.php: get_body_class()

Retrieve the classes for the body element as an array.
wp-includes/canonical.php: redirect_canonical()

Redirects incoming links to the proper URL based on the site url.
wp-includes/canonical.php: redirect_guess_404_permalink()

Attempts to guess the correct URL based on query vars
wp-includes/class-wp.php: WP::handle_404()

Set the Headers for 404, if nothing is found for requested URL.
wp-includes/comment-template.php: wp_list_comments()

List comments.
wp-includes/comment-template.php: comments_template()

Load the comment template specified in $file.
wp-includes/comment-template.php: get_comment_link()

Retrieve the link to a given comment.
wp-includes/functions.php: do_feed()

Load the feed template from the use of an action hook.
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Changelog

Changelog
Version Description
WP-3.9.0 The $default argument was introduced.
WP-1.5.0 Introduced.