generate unique random id when click on link php

Question

I need to create unique id on user's every click link. Let I have a code

<a class="popup-text" href="examplelink&aff_sub=<?php echo $up_id; ?>" data-toggle="modal">Upto Rs.10000 Cashback LED TVs 
+ Get additional upto Rs. 4 Cashback from afft</a>

when user click on that link $up_id should be automatically generated. $up_id should change every time when user click on that link. $up_id comes from following code

<?php 
$up_id=md5(uniqid(rand(), true)); 
?>

but I am getting same id every time.

It happens because php is static, it's loaded just one time. To get a different id, you need to reload de page. The solution is update the id using javascript or make a ajax request and get a new id every time you click on the link... And no one understood the real problem. — Iago, Oct 19 '15 at 07:33
ok @lago. Do u have any idea how should I update it using javascript — nehaJ, Oct 19 '15 at 07:48

score 0 · Answer 1 · answered Oct 19 '15 at 07:33

0

Best solution for this would be, get current timestamp and take md5() of thst

$up_id = md5(current time stamp);

answered Oct 19 '15 at 07:33

Niranjan N Raju

12,047
4
22
41

`md5(uniqid(rand(), true))` already generate a random string based on the time. See [the doc](http://php.net/manual/pt_BR/function.uniqid.php). – Iago Oct 19 '15 at 07:37

hvs9 · Accepted Answer · 2015-10-19T08:07:26.957

0

Instead of PHP you can generate random number by using javascript, tryout following code:

<a class="popup-text" href="examplelink" onclick="location.href=this.href+'?&aff_sub='+Math.floor((Math.random()*1000)+1);return false;" data-toggle="modal">Upto Rs.10000 Cashback LED TVs 
         + Get additional upto Rs. 4 Cashback from afft</a>

edited Oct 19 '15 at 08:07

answered Oct 19 '15 at 07:54

hvs9

70
6

score -1 · Answer 3 · answered Oct 19 '15 at 07:32

You can easily achieve this with the following function:

function random_string($length)
{
   $string = "";
   $chars = "abcdefghijklmanopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
   $size = strlen($chars);
   for ($i = 0; $i < $length; $i++) {
       $string .= $chars[rand(0, $size - 1)];
   }
   return $string; 
}

Here you first generate an empty string, then you define a string with all chars you want. After you also counted the numbers of chars you can start with filling your new string. You just use a for-loop to do this. Everytime the loopcontent is called, there is one random char (from your $char) added to your empty string.

You use this function (for example if you want to store your ID in a variable) by simply typing:

$password = rand_string(15) //the number specified in brackets is the amount of characters in your password

So with this function, you can just always generate a random string (in your case, a unique ID).

Let me know, if you're experiencing any issues.

`md5(uniqid(rand(), true))` already generate a random string. — Iago, Oct 19 '15 at 07:36

generate unique random id when click on link php

3 Answers3