Checks whether a post tag with a given name exists.

$tag_name int|string Required

mixed Returns null if the term does not exist.
Returns an array of the term ID and the term taxonomy ID if the pairing exists.
Returns 0 if term ID 0 is passed to the function.

File: wp-admin/includes/taxonomy.php. View all references

function tag_exists( $tag_name ) {
	return term_exists( $tag_name, 'post_tag' );
}