一个基于QR Code encoder的生成二维码的php扩展，同时实现了Discuz论坛系统里面的authcode函数，相比php版本速度更快，生成几万个二维码秒秒钟。如果使用Discuz论坛，需要有这方面性能提升的，那么该扩展时不错的选择。

依赖： php5.4+ libpng

示例代码：

DCode::encrypt($src, $key = "THIS IS SHIT", $ckeylength = 8, $expire = 0);  DCode::decrypt($src, $key = "THIS IS SHIT", $ckeylength = 8);     /**   * DCode::qrcode($str, $version = 0, $level = QR_ECLEVEL_L, $mode = QR_MODE_KANJI, $casesensitive = 0);  * @param $str;  * @param $version = 0;  * @param $level = QR_ECLEVEL_L;  * @param $model = QR_MODE_KANJI;  * @param $casesensitive = 0;  * @return string  */  $filecontent = DCode::qrcode("HELLO");  file_put_contents("test.png", $filecontent);     /**  * DCode::qrcode8bit($str, $version = 0, $level = QR_ECLEVEL_L);  * @param $str;  * @param $version = 0;  * @param $level = QR_ECLEVEL_L;  * @return string  */  $filecontent = DCode::qrcode8bit("HELLO WORLD");  file_put_contents("test1.png", $filecontent);     /**  * DCode::qrcodedata($sizeof, $data, $version = 0, $level = QR_ECLEVEL_L);  * @param $sizeof  * @param $data  * @param $version = 0;  * @param $level = QR_ECLEVEL_L;  * @return string  */  $filecontent = DCode::qrcodedata(strlen("HELLO WORLD"), "HELLO WORLD");  file_put_contents("test2.png", $filecontent);     dcode_encrypt($src, $key = "THIS IS SHIT", $ckeylength = 8, $expire = 0);  dcode_decrypt($src, $key = "THIS IS SHIT", $ckeylength = 8);     $filecontent = dcode_qrcode("HELLO");  file_put_contents("test.png", $filecontent);     $filecontent = dcode_qrcode8bit("HELLO 8bit");  file_put_contents("test1.png", $filecontent);     $filecontent = dcode_qrcodedata(strlen("HELLO 8bit"), "HELLO 8bit");  file_put_contents("test2.png", $filecontent);

项目主页：http://www.open-open.com/lib/view/home/1441010675112