Custom Excerpt Function

I have the following code to control the amount of characters in my excerpt to show on a page:

function get_my_excerpt(){
$excerpt = get_the_content();
$excerpt = substr($excerpt, 0, 200);
$excerpt = strip_shortcodes($excerpt);
$excerpt = substr($excerpt, 0, strripos($excerpt, " "));
$excerpt = strip_tags($excerpt);
$excerpt = trim(preg_replace( '/\s+/', ' ', $excerpt));
$excerpt = preg_replace(" (\[.*?\])",'',$excerpt);
$excerpt = $excerpt.'... [Read More]';
return $excerpt;
}

I can’t for the life of me remember how to code this part:
$excerpt = $excerpt.’… [Read More]’;

so that the [Read More] links to the post for further reading associated to the post it’s for.

Can someone help?