Make validation password must alphanumeric but can add special character

find all IPv4 addresses in text

Regular expression for phone numbers in Slovakia & Czech in international format.

French Phone Number Validation. Accept several kind of format, more or less usual. And refuse incorrect formats. Prefix: 0033 / +33 / (0) / 0 Number: collapsed / by 1 / group by 2 / group by 3 Separator: space / dot / dash / hyphen

(?)(.*) (?=) Выделение текста в определенном теге без учета переноса строки