如何更改此正则表达式，以验证电话号码而不使用国际化前缀？

Question

我不太喜欢REGEX，我正在找出一些问题来调整这个正则表达式来验证电话号码以适应我的用例。

我有一个REGEX验证电话号码，其国际前缀为：https://www.regextester.com/97440

(([+][(]?[0-9]{1,3}[)]?)|([(]?[0-9]{4}[)]?))\s*[)]?[-\s\.]?[(]?[0-9]{1,3}[)]?([-\s\.]?[0-9]{3})([-\s\.]?[0-9]{3,4})

它正确地验证字符串为：+39 3298494333，但它不验证表示没有国际前缀的数字的字符串，例如，该字符串与regex 3298494333不匹配

怎样才能接受没有前缀的电话号码呢？

Answer 1

使用此修补程序：

(?:(?:\+\(?[0-9]{1,3}|\(?\b[0-9]{4})\)?)?\s*\)?[-\s.]?\(?[0-9]{1,3}\)?[-\s.]?[0-9]{3}[-\s.]?[0-9]{3,4}

见证明。

解释

--------------------------------------------------------------------------------
  (?:                      group, but do not capture (optional
                           (matching the most amount possible)):
--------------------------------------------------------------------------------
    (?:                      group, but do not capture:
--------------------------------------------------------------------------------
      \+                       '+'
--------------------------------------------------------------------------------
      \(?                      '(' (optional (matching the most
                               amount possible))
--------------------------------------------------------------------------------
      [0-9]{1,3}               any character of: '0' to '9' (between
                               1 and 3 times (matching the most
                               amount possible))
--------------------------------------------------------------------------------
     |                        OR
--------------------------------------------------------------------------------
      \(?                      '(' (optional (matching the most
                               amount possible))
--------------------------------------------------------------------------------
      \b                       the boundary between a word char (\w)
                               and something that is not a word char
--------------------------------------------------------------------------------
      [0-9]{4}                 any character of: '0' to '9' (4 times)
--------------------------------------------------------------------------------
    )                        end of grouping
--------------------------------------------------------------------------------
    \)?                      ')' (optional (matching the most amount
                             possible))
--------------------------------------------------------------------------------
  )?                       end of grouping
--------------------------------------------------------------------------------
  \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                           more times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  \)?                      ')' (optional (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  [-\s.]?                  any character of: '-', whitespace (\n, \r,
                           \t, \f, and " "), '.' (optional (matching
                           the most amount possible))
--------------------------------------------------------------------------------
  \(?                      '(' (optional (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  [0-9]{1,3}               any character of: '0' to '9' (between 1
                           and 3 times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  \)?                      ')' (optional (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  [-\s.]?                  any character of: '-', whitespace (\n, \r,
                           \t, \f, and " "), '.' (optional (matching
                           the most amount possible))
--------------------------------------------------------------------------------
  [0-9]{3}                 any character of: '0' to '9' (3 times)
--------------------------------------------------------------------------------
  [-\s.]?                  any character of: '-', whitespace (\n, \r,
                           \t, \f, and " "), '.' (optional (matching
                           the most amount possible))
--------------------------------------------------------------------------------
  [0-9]{3,4}               any character of: '0' to '9' (between 3
                           and 4 times (matching the most amount
                           possible))