code: public function GIFReadExtensions()
      {
          GIFDecoder::GIFGetByte(1);
          for (;;) {
              GIFDecoder::GIFGetByte(1);
              if (($u = $this->GIF_buffer[0]) == 0x00) {
                  break;
              }
              GIFDecoder::GIFGetByte($u);
              /*
               * 07.05.2007.
               * Implemented a new line for a new function
               * to determine the originaly delays between
               * frames.
               *
               */
              if (4 == $u) {
                  $this->GIF_delays[] = ($this->GIF_buffer[1] | $this->GIF_buffer[2] << 8);
              }
          }
      }
docs: /*
  :::::::::::::::::::::::::::::::::::::::::::::::::::
  ::
  ::    GIFReadExtension ( )
  ::