你看过的最长的正则表达式是什么？

Question

我刚刚发现一个非常长的正则表达式(6000多个字符)用于WordPress电子邮件验证.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.

Answer 1

正则表达式来验证的电子邮件地址(可能是多个在to:,cc:和bcc:形式)(从RFC 822)是相当结实; 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网站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有效电子邮件地址的网站.

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Answer 2

一个正确的电子邮件地址验证的正则表达式.

6,343个字符.

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