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WP_Query::is_tag( mixed $tag = '' )

Is the query for an existing tag archive page?

Description

If the $tag parameter is specified, this function will additionally check if the query is for one of the tags specified.

Parameters

$tag

(mixed) (Optional) Tag ID, name, slug, or array of Tag IDs, names, and slugs.

Default value: ''

Return

(bool)

Source

File: wp-includes/class-wp-query.php

public function is_tag( $tag = '' ) {
		if ( ! $this->is_tag ) {
			return false;
		}

		if ( empty( $tag ) ) {
			return true;
		}

		$tag_obj = $this->get_queried_object();

		$tag = array_map( 'strval', (array) $tag );

		if ( in_array( (string) $tag_obj->term_id, $tag ) ) {
			return true;
		} elseif ( in_array( $tag_obj->name, $tag ) ) {
			return true;
		} elseif ( in_array( $tag_obj->slug, $tag ) ) {
			return true;
		}

		return false;
	}

Changelog

Version Description
3.1.0 Introduced.

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