Checks if the current post has any of given tags.

The given tags are checked against the post’s tags’ term_ids, names and slugs.
Tags given as integers will only be checked against the post’s tags’ term_ids.

If no tags are given, determines if post has any tags.

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

function has_tag( $tag = '', $post = null ) {
	return has_term( $tag, 'post_tag', $post );
}