1.PHP 正则 preg_match 匹配长度限制

https://learnku.com/articles/7193/php-regular-preg-match-matching-length-limit

2.深悉正则(pcre)最大回溯/递归限制

http://www.laruence.com/2010/06/08/1579.html

3.Redis的内存优化

https://cachecloud.github.io/2017/02/16/Redis%E5%86%85%E5%AD%98%E4%BC%98%E5%8C%96

4.Content-Disposition 的 filename 与 filename* 区别

https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Headers/Content-Disposition

5.Redis Scan 命令原理

https://segmentfault.com/a/1190000018218584

6.Redis 字典的遍历 dictScan 算法

http://www.langdebuqing.com/redis%20notebook/redis%E6%BA%90%E7%A0%81%E9%9A%BE%E7%82%B9%EF%BC%9A%E5%AD%97%E5%85%B8%E7%9A%84%E9%81%8D%E5%8E%86dictScan.html