I have a regex to check phone numbers in a text. Please check below.

(\d[\s-]?)?[\(\[\s-]{0,2}?\d{3}[\)\]\s-]{0,2}?\d{3}[\s-]?\d{4}

This regex works fine but it does not work well if I write it this way.

1. Ex 1: 088 11 22 458
2. Ex 2: 1 88 11 22 458

How can I modify the regex to fix this bug?

CodePudding user response：

You can add an optional at the start, allow two or three digits in the area code and add an alternative to match two double digits and then a chunk of three digits in the end:

(?:\ ?\d[\s-]?)?[([\s-]{0,2}\d{2,3}[)\]\s-]{0,2}(?:\d{3}[\s-]?\d{4}|\d{2}[\s-]?\d{2}[\s-]?\d{3})

See the regex demo. Details:

• (?:\ ?\d[\s-]?)? - an optional occurrence of an optional , a digit and then a whitespace or a hyphen
• [([\s-]{0,2} - zero, one or two (, [, whitespace or hyphen chars
• \d{2,3} - two or three digits
• [)\]\s-]{0,2} - zero, one or two ), ], whitespace or hyphen chars
• (?:\d{3}[\s-]?\d{4}|\d{2}[\s-]?\d{2}[\s-]?\d{3}) - either of
  • \d{3}[\s-]?\d{4} - three digits, an optional whitespace or -, four digits
  • | - or
  • \d{2}[\s-]?\d{2}[\s-]?\d{3} - two digits, an optional whitespace or -, two digits, an optional whitespace or -, three digits

You might also think of adding numeric boundaries to disallow matches that have other digits on the left (with the negative (?<!\d) lookbehind) and right (with the negative (?!\d) lookahead):

(?:\ ?(?<!\d)\d[\s-]?)?[([\s-]{0,2}(?<!\d)\d{2,3}[)\]\s-]{0,2}(?:\d{3}[\s-]?\d{4}|\d{2}[\s-]?\d{2}[\s-]?\d{3})(?!\d)

See this regex demo.

CodePudding user response：

I would use this regex: [\ \(\[]?\d[\(\[\s-]?\d[\s-]?\d[\)\]\s-]?\d[\s-]?\d[\s-]?\d[\s-]?\d[\s-]?\d[\s-]?\d[\s-]?\d

It allows to use delimiters in any place. Sometimes phone numbers are delimiter so that it will be easier to remember them.

For example:

• 088 111-2-111
• (088)11-22-33-4