The following code snippet will check if the mobile number digits are within 10-15 digits including '+' at the start and followed by a non-zero first digit.
Regular expression
"/^[+]?[1-9][0-9]{9,14}$/"
Code snippet
// Validation for the mobile field.
function validateMobileNumber($mobile) {
if (!empty($mobile)) {
$isMobileNmberValid = TRUE;
$mobileDigitsLength = strlen($mobile);
Top comments (1)
I don't think that's a particularly good answer, or something that can be generalised like that.
It presumes not only the things the asker is looking for - a number is 11 or 15 digits long and may or may not start with a
+- but that the first digit isn't zero.Most people in my country (UK) will enter their mobile number starting
07, because that's the most common prefix and0means "stand by telephone exchange because I'm about to hit you with a national number".The trouble is, not all phones are mobile, not all mobiles have to start with a
7, people have redirected numbers in the same way they might have P.O. Boxes, and people may or may not want to use an internationalised number.I guarantee any site using a regex (or expanded set of rules) like this one will have a small number of annoyed users who can't seem to put in their perfectly legitimate number.