Why my Regex is not detecting phone numbers written in certain patterns?

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?

>Solution :

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.