用来在Linux下遍历目录，相当于find命令，是练习嵌套和回调函数的好例子。-It can be used to look through directory ,equal to find .It is a good example to pratice embed function and call faunction.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001262s ]
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:0.104319s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001103s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001847s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001229s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003605s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001025s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003170s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015108s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001385s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 316430 [ RunTime:0.001192s ]
