Codeigniter: Generate alphanumeric id

Question

I want to generate an id against a newly created user.

I want it to be something like this.

Brb-0001 after first registration.

after 10th registration it should be something like this

Brb-0010

And so on .

while searching I have come across various number generating functions but neither of these were helping me.

i have tried these functions so far. echo random_string('alnum',5); echo rand(5,10); echo random_int(100, 999); — , Feb 23 '17 at 14:37
send DB reqest and get the las value of `barber_number` and add + 1 to that number add save it in new ... — Abdulla Nilam, Feb 23 '17 at 14:56
[Use sprintf to format a zero filled fixed number string](http://stackoverflow.com/a/1699980/3585500). `$myID = 'Brb-' . sprintf('%04d', 1);` — ourmandave, Feb 23 '17 at 14:59
Not sure if this will help you https://www.codeigniter.com/user_guide/helpers/string_helper.html#increment_string — , Feb 24 '17 at 00:41

score 0 · Answer 1 · answered Feb 23 '17 at 17:31

This is wrong way. Use autoincrement integer field at database for this. Then you can always add Brb- prefix to this ID combined with some kind of pad left function (inside query or inside your PHP code).

Any other solutions may lead to race conditions. What if two users will register at the same time? I am pretty sure thay will have the same ID.

Codeigniter: Generate alphanumeric id

1 Answers1