^(?:(?:+|00)33[s.-]{0,3}(?:(0)[s.-]{0,3})?|0)[1-9](?:(?:[s.-]?d{2}){4}|d{2}(?:[s.-]?d{3}){2})$
^ (?:(?:+|00)33|0) # Dialing code s*[1-9] # First number (from 1 to 9) (?:[s.-]*d{2}){4} # End of the phone number $