php在线生成ico文件的代码

            }

        }

        foreach ($gd_image_array as $key => $gd_image) {
            $biSizeImage = $ImageWidths[$key] * $ImageHeights[$key] * ($bpp[$key] / 8);

            // BITMAPINFOHEADER - 40 bytes
            $BitmapInfoHeader[$key]  = '';
            $BitmapInfoHeader[$key] .= "x28x00x00x00";                              // DWORD  biSize;
            $BitmapInfoHeader[$key] .= $this->LittleEndian2String($ImageWidths[$key], 4);      // LONG   biWidth;
            // The biHeight member specifies the combined
            // height of the XOR and AND masks.
            $BitmapInfoHeader[$key] .= $this->LittleEndian2String($ImageHeights[$key] * 2, 4); // LONG   biHeight;
            $BitmapInfoHeader[$key] .= "x01x00";                                      // WORD   biPlanes;
               $BitmapInfoHeader[$key] .= chr($bpp[$key])."x00";                          // wBitCount;
            $BitmapInfoHeader[$key] .= "x00x00x00x00";                              // DWORD  biCompression;
            $BitmapInfoHeader[$key] .= $this->LittleEndian2String($biSizeImage, 4);            // DWORD  biSizeImage;