^(\/\/)(?![\ ])(\w)*

Regex validator for the phone number based on E.164 standard

中文英文匹配规则

(?=\w{5,})(?=\D*\d{2}$)

An invoice number always has 10 digits, starting with a '9' (e.g. '9400065741'). But a number should also be found if it contains white-spaces. These numbers should also be found: '9400065741' ' 94 00065741'...

A variety of BEM flavoured regex.