Question

对于下面给出的表达式可用于匹配？

([0123][0-9])-([01][0-9])-([0-9]{4})

要添加此内容，可以是社会安全号码，电子邮件，日期时间等

Answer 1

这可以匹配00-00-0000给出的正则表达式

打破表达式：

([0123]    -- Match 0 .. 3
[0-9])     -- Match 0 .. 9
-          -- Match a dash
([01]      -- Match a 0 or a 1
[0-9])     -- Match 0 .. 9
-          -- Match dash
([0-9]{4}) -- Match 4 numbers in the range of 0 .. 9

至于圆括号，它们只捕捉其中的表达式，即。 ([0123][0-9])将捕获前两个匹配件。

Answer 2

我之前曾提到过RegexBuddy有多棒：

([0123][0-9])-([01][0-9])-([0-9]{4})

Match the regular expression below and capture its match into backreference number 1 «([0123][0-9])»
   Match a single character present in the list “0123” «[0123]»
   Match a single character in the range between “0” and “9” «[0-9]»
Match the character “-” literally «-»
Match the regular expression below and capture its match into backreference number 2 «([01][0-9])»
   Match a single character present in the list “01” «[01]»
   Match a single character in the range between “0” and “9” «[0-9]»
Match the character “-” literally «-»
Match the regular expression below and capture its match into backreference number 3 «([0-9]{4})»
   Match a single character in the range between “0” and “9” «[0-9]{4}»
      Exactly 4 times «{4}»


Created with RegexBuddy

php中的正则表达式

2 个答案: