一个非常好的ping源代码程序，强烈推荐。
可以好好研究和学习，可以更加深入理解icmp协议。-a very good ping source code procedures, and strongly recommended. Can be properly examined and learning to be more in-depth understanding icmp agreement.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001548s ]
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:0.105116s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001813s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003401s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001937s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005867s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001188s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003290s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014605s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001443s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 224685 [ RunTime:0.001329s ]
