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查询10分钟前的数据 SELECT * FROM tabWHERE ( NOW()- INTERVAL 3 MINUTE)<gmt_create 3分钟内新建的数据 分组排序 -- 按 field2分组,取出组内field1最大值对应行的field3字段值SELECT MAX(field1), fi 阅读全文
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http://www.infoq.com/cn/articles/CAPTCHA-image-recognitionhttp://i.wshang.com/Post/Default/Index/pid/242211.html 阅读全文
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Volume 2 ctrl+s http://web.mit.edu/merolish/ticpp/TicV2.html http://web.mit.edu/merolish/ticpp/TicV2.html#_TocRef53985657 Volume 1 http://web.mit.edu/ 阅读全文
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https://en.wikipedia.org/wiki/Levenshtein_distance 验证码识别 图片中的二维码截取 阅读全文
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similar_text 阅读全文
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'0' => '000111000011111110011000110110000011110000011110000011110000011110000011110000011110000011011000110011111110000111000', '1' => '00011100001111 阅读全文