remove_scheme() public method

Remove scheme from URL.
public remove_scheme ( string $url ) : string
$url string
return string
 /**
  * Push to URL pairs.
  *
  * @param array  $url_pairs
  * @param int    $attachment_id
  * @param string $find
  * @param array  $to_cache
  */
 protected function push_to_url_pairs(&$url_pairs, $attachment_id, $find, &$to_cache)
 {
     $find_full = $this->as3cf->remove_size_from_filename($find);
     $find_full = $this->normalize_find_value($this->as3cf->maybe_remove_query_string($find_full));
     $find_size = $this->normalize_find_value($this->as3cf->maybe_remove_query_string($find));
     // Cache find URLs even if no replacement.
     $to_cache[$find_full] = $attachment_id;
     if (wp_basename($find_full) !== wp_basename($find_size)) {
         $to_cache[$find_size] = $attachment_id;
     }
     $replace_full = $this->get_url($attachment_id);
     // Replacement URL can't be found.
     if (!$replace_full) {
         return;
     }
     $size = $this->get_size_string_from_url($attachment_id, $find);
     $replace_size = $this->get_url($attachment_id, $size);
     $parts = parse_url($find);
     if (!isset($parts['scheme'])) {
         $replace_full = $this->as3cf->remove_scheme($replace_full);
         $replace_size = $this->as3cf->remove_scheme($replace_size);
     }
     // Find and replace full version
     $url_pairs[$find_full] = $replace_full;
     // Find and replace sized version
     if (wp_basename($find_full) !== wp_basename($find_size)) {
         $url_pairs[$find_size] = $replace_size;
     }
     // Prime cache, when filtering the opposite way
     $replace_full = $this->as3cf->maybe_remove_query_string($replace_full);
     $replace_size = $this->as3cf->maybe_remove_query_string($replace_size);
     $to_cache[$this->normalize_find_value($replace_full)] = $attachment_id;
     $to_cache[$this->normalize_find_value($replace_size)] = $attachment_id;
 }