Regular expression for validating international phone numbers Webcam sex show
It excludes Mexico and the Central American nations.So far, the regular expression matches any 10-digit number. As we’ve repeatedly seen, parentheses are special characters in regular expressions, but in this case we want to allow a user to enter parentheses and have our regex recognize them. ⋯ # [Match the remaining digits and separator.] $ # Assert position at the end of the string..The following layout breaks the regular expression into its individual parts, omitting the redundant groups of digits: ^ # Assert position at the beginning of the string. Any quantifier that allows something to be repeated zero times effectively makes that element optional. This is a textbook example of where we need a backslash to escape a special character so the regular expression treats it as literal input.
Note that although this recipe claims to handle North American phone numbers, it’s actually designed to work with (NANP) numbers.Requirements: To determine whether a user entered a North American phone number in a common format, including the local area code.The supported formats are 1234567890, 123-456-7890, 123.456.7890, 1, (123) 456 7890, and all related combinations.The regexes in these recipes are all pretty straightforward, but hopefully this gives an example of the depth you can expect from the book. Both are followed by a question mark, which makes them optional.For more than 100 detailed regular expression recipes that include equal coverage for eight programming languages (C#, Java, Java Script, Perl, PHP, Python, Ruby, and VB. We’ll explain more about the question mark after discussing the other types of tokens in this regular expression.
If you want to limit matches to valid phone numbers according to the North American Numbering Plan, here are the basic rules: Beyond the basic rules just listed, there are a variety of reserved, unassigned, and restricted phone numbers.