is_attachment() – Function | Developer.WordPress.org

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

$attachmentint|string|int[]|string[]optional: Attachment ID, title, slug, or array of such to check against.
Default:''

Return

bool Whether the query is for an existing attachment page.

More Information

See Also: is_singular()
For more specific checking of the attachment see: wp_attachment_is_image()

Source

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 );
}

View all references View on Trac View on GitHub

Uses	Description
WP_Query::is_attachment()`wp-includes/class-wp-query.php`	Determines whether the query is for an existing attachment page.
_doing_it_wrong()`wp-includes/functions.php`	Marks something as being incorrectly called.

Used by	Description
wp_embed_excerpt_attachment()`wp-includes/embed.php`	Filters the post excerpt for the embed template.
get_adjacent_post_link()`wp-includes/link-template.php`	Retrieves the adjacent post link.
get_adjacent_post_rel_link()`wp-includes/link-template.php`	Retrieves the adjacent post relational link.
adjacent_posts_rel_link_wp_head()`wp-includes/link-template.php`	Displays relational links for the posts adjacent to the current post for single post pages.
get_boundary_post()`wp-includes/link-template.php`	Retrieves the boundary post.
wp_list_pages()`wp-includes/post-template.php`	Retrieves or displays a list of pages (or hierarchical post type items) in list (li) format.
get_post_class()`wp-includes/post-template.php`	Retrieves an array of the class names for the post container element.
get_body_class()`wp-includes/post-template.php`	Retrieves an array of the class names for the body element.
redirect_canonical()`wp-includes/canonical.php`	Redirects incoming links to the proper URL based on the site url.