Modify the_post_thumbnail so it takes additional parameter

Hello,

I’ve got this custom function, that wraps my the_post_thumbnail() inside anchor tag:

add_filter( 'post_thumbnail_html', 'my_post_image_html', 10, 3 );

function my_post_image_html( $html, $post_id, $post_image_id ) {

	$html = '<a href="' . get_permalink( $post_id ) . '" title="' . esc_attr( get_post_field( 'post_title', $post_id ) ) . '">' . $html . '</a>';

	return $html;
}

Then i simply call it in code by doing the_post_thumbnail() ofcourse. I’d like to give my function additional parameters $is_link, so when i would call the_post_thumbnail($is_link = false), it would return the thumbnail without wraping it inside of a link.