php: img src minus two folders

Question

i have an url <img src="http://gebhart.dk/gdk15/wp-content/uploads/2015/02/3023.jpg">

but i need "2015/02/3023.jpg"

this is not working: $value is the url

print_r(parse_url($value));

$tokens = explode('/', $value);
echo $tokens[sizeof($tokens)-3];

or

parse_url($value);

but then i get <img src="/gdk15/wp-content/uploads/2015/02/3023.jpg">

how can i get the url form the img src minus 2 folders?

Answer 1

Quick and dirty:

$relurl=explode('/', $value);
$relurl=array_slice($relurl, -3);
echo implode('/', $relurl);