应用错误收集

你看过的最长的正则表达式是什么？

时间：2010-02-11 15:01:46

标签： regex

我刚刚为WordPress电子邮件验证找到了一个非常长的正则表达式（6000多个字符）。这让我想到，在生产环境中使用的实际上看到的最长的是什么。

3 个答案:

答案 0 :(得分：41)

用于验证电子邮件地址的正则表达式（可能是to:，cc:和bcc:形式中的多个）（来自RFC 822）非常强大;绝对是我见过的最长的非平凡的正则表达式。不幸的是，似乎互联网上有很多站点没有使用这个正则表达式或等效验证，因为我遇到了太多不接受myemailaddress+yourstupidsite@gmail.com作为有效电子邮件地址的站点。

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(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\". \[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?: \r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\[ "()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t]) *))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]) +|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\ .(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z |(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:( ?:\r\n)?[ \t])*))*)?;\s*)

答案 1 :(得分：12)

A correct email address validation regex。

6,343个字符。

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答案 2 :(得分：3)

几年前我写了一篇解析COBOL数据部门源代码的文章。

我们使用解析后的令牌创建XML文件并动态构建用户界面以测试IMS事务并生成VB6代码以将该事务结果分解为XML文档。