WP_Query::is_tag() │ public │ WP 3.1.0

Determines whether the query is for an existing tag archive page.

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

Method of the class: WP_Query{}

No Hooks.

Return

true|false. Whether the query is for an existing tag archive page.

Usage

global $wp_query;
$wp_query->is_tag( $tag );

$tag(int|string|int[]|string[])

Tag ID, name, slug, or array of such to check against.
Default: ''

Changelog

WP_Query::is_tag() WP Query::is tag code ^{WP 6.7.2}

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

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

	$tag_obj = $this->get_queried_object();
	if ( ! $tag_obj ) {
		return false;
	}

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

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

	return false;
}