is_singular() WordPress Function

function is_singular( $post_types = '' ) {
	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_singular( $post_types );
}
Uses	Description
wp-includes/l10n.php:__()	Retrieve the translation of $text.
wp-includes/class-wp-query.php:WP_Query::is_singular()	Is the query for an existing single post of any post type (post, attachment, page, custom post types)?
wp-includes/functions.php:_doing_it_wrong()	Mark something as being incorrectly called.
Used By	Description
wp-includes/rest-api.php:rest_get_queried_resource_route()	Gets the REST route for the currently queried object.
wp-includes/widgets/class-wp-widget-text.php:WP_Widget_Text::_filter_gallery_shortcode_attrs()	Filters gallery shortcode attributes.
wp-includes/widgets/class-wp-widget-custom-html.php:WP_Widget_Custom_HTML::_filter_gallery_shortcode_attrs()	Filters gallery shortcode attributes.
wp-includes/widgets/class-wp-widget-custom-html.php:WP_Widget_Custom_HTML::widget()	Outputs the content for the current Custom HTML widget instance.
wp-includes/embed.php:wp_oembed_add_discovery_links()	Adds oEmbed discovery links in the head element of the website.
wp-includes/general-template.php:wp_get_document_title()	Returns document title for the current page.
wp-includes/general-template.php:feed_links_extra()	Display the links to the extra feeds such as category feeds.
wp-includes/class-wp.php:WP::handle_404()	Set the Headers for 404, if nothing is found for requested URL.
wp-includes/widgets/class-wp-widget-text.php:WP_Widget_Text::widget()	Outputs the content for the current Text widget instance.
wp-includes/link-template.php:rel_canonical()	Outputs rel=canonical for singular queries.
wp-includes/link-template.php:wp_get_shortlink()	Returns a shortlink for a post, page, attachment, or site.
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/post-template.php:is_page_template()	Determines whether the current post uses a page template.
wp-includes/post-template.php:wp_list_pages()	Retrieves or displays a list of pages (or hierarchical post type items) in list (li) format.
wp-includes/post-template.php:get_body_class()	Retrieves an array of the class names for the body element.
wp-includes/canonical.php:redirect_canonical()	Redirects incoming links to the proper URL based on the site url.