这是一个PHP二维码在线生成源码，采用的是PHP QR Code类库生成，在生成时调用这个类文件即可，用此方法生成二维码，相对来说是比较简单的了。这个二维码生成用法也挺简单，直接在文本框中输入文字或网址后，单击按钮即可生成。输入内容后，点击按钮就可以生成QR。
不过本源码只能生成一种大小的二维码，后期你可以自己扩展吧，让其可生成多种大小的二维码。
使用方法：把所有的文件都网站目录下都可以，打开index.php就可以生成二维码。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001384s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.095461s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001318s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001999s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001329s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003913s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001150s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003431s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015983s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001710s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 37526 [ RunTime:0.001215s ]
