How can I split a string in PHP at the nth occurrence of a needle?

Question

There must be a fast and efficient way to split a (text) string at the "nth" occurrence of a needle, but I cannot find it. There is a fairly full set of functions

Answer 1

function split_nth($haystack, $needle, $nth){
    $result = array();
    if(substr_count($haystack,$needle) > ($nth-1)){
        $haystack = explode($needle, $haystack);
        $result[] = implode(array_splice($haystack, 0, $nth), $needle);
        $result[] = implode($haystack, $needle);
    }
    return $result;
}