thara Posted January 14, 2013 Share Posted January 14, 2013 I'm looking for a function or some logic that will validate a 10 digit long phone number. I'd like to make sure that the number is exactly 10 digits, no letters, no hyphens etc.. And also need to check first digit of the number start with 0. Eg: 0714556260 I simply check something like this.. $test = 0714556260; if (preg_match('/^0\d{9}$/', $test) ) { echo 'valid'; } else { echo 'not valid'; } But can not get to work. Can someone help out? Thank you.. Quote Link to comment Share on other sites More sharing options...
MDCode Posted January 14, 2013 Share Posted January 14, 2013 These two resources will help you with the all numbers and exactly 10 characters: ctype_digit() and strlen() Quote Link to comment Share on other sites More sharing options...
thara Posted January 14, 2013 Author Share Posted January 14, 2013 Thanks for response. But I need to know How I check the number always start from zero... 0714556260 - ok 3243423444 - not ok Quote Link to comment Share on other sites More sharing options...
MDCode Posted January 14, 2013 Share Posted January 14, 2013 if(substr($test, 0, 1) == "0") { echo "valid"; } Quote Link to comment Share on other sites More sharing options...
JonnoTheDev Posted January 14, 2013 Share Posted January 14, 2013 $tel = '0123456789'; if (preg_match('/(0[0-9]{9})/', $tel)) { print "valid"; } else { print "invalid"; } Quote Link to comment Share on other sites More sharing options...
Christian F. Posted January 15, 2013 Share Posted January 15, 2013 (edited) The reason why your initial test didn't work, or rather seemed like it wasn't working, is quite simple. Though, it might be a bit surprising: php > $test = 0714556260; php > echo strlen ($test); 9 php > echo $test; 120773808 Quite simply: By adding the 0 in front of an integer, you're telling PHP that it's a octal (base-8) number. To get it treated like a decimal, you need to add quotes around it to make it a string. Which is really is, by the way; A string of digits. Edited January 15, 2013 by Christian F. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.