function valid_cs_phone_number in Phone 7

Same name and namespace in other branches

1. 6 phone.cs.inc \valid_cs_phone_number()

Verifies that $phonenumber is a valid nine-digit Czech phone number

Parameters

string $phonenumber:

Return value

boolean Returns boolean FALSE if the phone number is not valid.

File

include/phone.cs.inc, line 21

CCK Field for Czech phone numbers.

Code

function valid_cs_phone_number($phonenumber) {
  $phonenumber = trim($phonenumber);

  // define regular expression
  $regex = '/^((?:\\+|00)420)? ?(\\d{3}) ?(\\d{3}) ?(\\d{3})$/';

  // return true if valid, false otherwise
  return (bool) preg_match($regex, $phonenumber);
}