Regular expression for validating international phone numbers dating ethiopian jewish service
Since a question mark is used after each separator, the phone number digits are allowed to run together.
A regular expression can easily check whether a user entered something that looks like a valid phone number. In this case, backreferences to the captured values are used in the replacement text so we can easily reformat the phone number as needed.
You can allow an optional, leading “1” for the country code (which covers the North American Numbering Plan region) via the addition shown in the following regex: .
When a question mark follows an unescaped left parenthesis like this, it’s not a quantifier, but instead helps to identify the type of grouping.
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..