Regular expression for validating international phone numbers

If you are ready to plug and play, be our guest: the practical regular expressions are listed and described in Chapters 4 through 9.But the initial chapters of this book may save you a lot of time in the long run. List phone Numbers = new Array List(); phone Numbers.add(" 1 1234567890123"); phone Numbers.add(" 12 123456789"); phone Numbers.add(" 123 123456"); String regex = "^\ (? )[0-9]$"; Pattern pattern = Pattern.compile(regex); for(String email : phone Numbers) Output: 1 1234567890123 : true 12 123456789 : true 123 123456 : true This regular expression follows the international phone number notation specified by the Extensible Provisioning Protocol (EPP).Having opened this cookbook, you are probably eager to inject some of the ungainly strings of parentheses and question marks you find in its chapters right into your code.In this regex tutorial, we will learn to validate international phone numbers based on industry-standard notation specified by ITU-T E.123The rules and conventions used to print international phone numbers vary significantly around the world, so it’s hard to provide meaningful validation for an international phone number unless you adopt a strict format. It is used by a growing number of domain name registries, including .com, .info, .net, .org, and Fortunately, there is a simple, industry-standard notation specified by ITU-T E.123. The significance of this is that EPP-style international phone numbers are increasingly used and recognized, and therefore provide a good alternative format for storing (and validating) international phone numbers. NNNNNNNNNNx EEEE, where C is the 1–3 digit country code, N is up to 14 digits, and E is the (optional) extension.Doing this solves 2 problems - testing the result is now easy and you can now ensure that values rendered back out for display can all be formatted consistently. Regex: Here's a wonderful pattern that most closely matched the validation that I needed to achieve.

Also thanks to the international phone numbering plan (ITU-T E.164), phone numbers cannot contain more than 15 digits. : # Group but don't capture: [0-9] # Match a digit. The literal “x” character is required only if an extension is provided. Those numbers are guaranteed not to connect to an actual phone number so they're often used in television and movies to ensure that a viewer doesn't try to call the number and end up harassing some poor innocent.@rushinge While that was true decades ago, it is no longer true. Honestly, I would recommend you don't try to validate phone numbers.The 555 prefix is still special, but only a small range of numbers are guaranteed to terminate without connection 555-0100 to 555-0199. This is good and all, but it doesn't validate what was entered was actually a phone number. Even if you could write a big, hairy validator that would allow all the different legitimate formats, it would end up allowing pretty much anything even remotely resembling a phone number in the first place.It works now, but you missed the - if ($input_type == 'aplha') { if ($input_type == 'alpha') { near the end of the file.However, I don't think that part of the code is used because it works without fixing that - input_type seems to be declared as digits at the start of the function: function phone_country_code_convert($code, $input_type = 'digits') {For the default of 1 the function returns 'us' instead of 'ca'.

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