How to generate 5 digit alphanumeric unique ID using codeigniter?

Question

I have a project in which I need to generate a unique 5 digit alphanumeric ID for the user. How can I achieve this using codeigniter!?

thanks

I haven't tried this yet but could you not just use vanilla PHP's dechex(int);? — scunliffe, Dec 24 '10 at 16:25
You can check this post with quite similar requirement. http://stackoverflow.com/questions/3289086/generate-10-digits-alphanumeric-value-in-php-with-first-third-fourth-digit-must — Alpesh, Dec 24 '10 at 18:01

score 13 · Accepted Answer · answered Dec 24 '10 at 17:00

13

There is a function for that in string helper called random_string.

$this->load->helper('string');
echo random_string('alnum',5);

Details

answered Dec 24 '10 at 17:00

navruzm

503
3
7

@navruzm, you need to check **uniqueness** in the loop, and to regenerate, or its just a regular random string.. – Farside Mar 04 '16 at 11:06

score 3 · Answer 2 · answered Aug 30 '11 at 09:02

3

You could try using uniqid()

answered Aug 30 '11 at 09:02

Ash

8,583
10
39
52

score 1 · Answer 3 · answered Dec 24 '10 at 17:36

1

Since you need a unique id, then you should use a unique data from the user record (index for example) or just generate a random one and directly check it's occurrence in the DB.

Here are the two approaches:

answered Dec 24 '10 at 17:36

ifaour

38,035
12
72
79

First link is off, here guys https://www.codeigniter.com/user_guide/helpers/string_helper.html – Marcelo Agimóvel Sep 08 '17 at 02:13

score 0 · Answer 4 · edited Mar 04 '16 at 10:50

The below piece of code has to be written under calculation field in sharepoint list to generate combination alpha numeric item id dynamically in the incremental model.

=field1&"-"&LEFT("00000",5-(LEN(TEXT([field2],"0"))))&TEXT([field2],"0")

filed1=contains the prefix alpha value i.e (xyz,abc)

field2=contains the starting value of the field1 range i.e (1,10,20)

output: xyz-00001,abc-00010..

score 0 · Answer 5 · edited May 23 '17 at 12:13

I would highly recommend to use UUID for such purposes, as you project definitely will grow into something more serious.

For example, here's how we do in our project UID generation:

<?php 
// ...
public function getUid($uid = null)
{
    while (! $this->isValid($uid)) {
        $uid = sprintf('%04x%04x%02x', mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xff));
    }
    return $uid;
}

or find out another thread, with more complicated algorithms of generating UUID v4

score 0 · Answer 6 · answered Dec 24 '10 at 18:19

0

Convert the user's numeric id (which I am assuming you already have) to base-36 using base_convert($id, 10, 36);

answered Dec 24 '10 at 18:19

Mike C

1,808
15
17

How to generate 5 digit alphanumeric unique ID using codeigniter?

6 Answers6

Linked