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is_attachment( int|string|int[]|string[] $attachment = '' )

Determines whether the query is for an existing attachment page.

Description

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

Parameters

$attachment

(int|string|int[]|string[]) (Optional) Attachment ID, title, slug, or array of such to check against.

Default value: ''

Return

(bool) Whether the query is for an existing attachment page.

More Information

Source

File: wp-includes/query.php 

function is_attachment( $attachment = '' ) {
	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_attachment( $attachment );
}

Uses

Uses Description
wp-includes/l10n.php: __()

Retrieve the translation of $text.
wp-includes/class-wp-query.php: WP_Query::is_attachment()

Is the query for an existing attachment page?
wp-includes/functions.php: _doing_it_wrong()

Mark something as being incorrectly called.

Used By

Used By Description
wp-includes/embed.php: wp_embed_excerpt_attachment()

Filters the post excerpt for the embed template.
wp-includes/link-template.php: get_adjacent_post_link()

Retrieves the adjacent post link.
wp-includes/link-template.php: get_adjacent_post_rel_link()

Retrieves the adjacent post relational link.
wp-includes/link-template.php: adjacent_posts_rel_link_wp_head()

Displays relational links for the posts adjacent to the current post for single post pages.
wp-includes/link-template.php: get_boundary_post()

Retrieves the boundary post.
wp-includes/post-template.php: wp_list_pages()

Retrieve or display a list of pages (or hierarchical post type items) in list (li) format.
wp-includes/post-template.php: get_post_class()

Retrieves an array of the class names for the post container element.
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.

Changelog

Version Description
2.0.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/is_attachment