php random x digit number

You can use rand() together with pow() to make this happen:

$digits = 3;echo rand(pow(10, $digits-1), pow(10, $digits)-1);

This will output a number between 100 and 999. This because 10^2 = 100 and 10^3 = 1000 and then you need to subtract it with one to get it in the desired range.

If 005 also is a valid example you'd use the following code to pad it with leading zeros:

$digits = 3;echo str_pad(rand(0, pow(10, $digits)-1), $digits, '0', STR_PAD_LEFT);

I usually just use RAND() http://php.net/manual/en/function.rand.php

e.g.

rand ( 10000 , 99999 );

for your 5 digit random number

Here is a simple solution without any loops or any hassle which will allow you to create random string with characters, numbers or even with special symbols.

$randomNum = substr(str_shuffle("0123456789"), 0, $x);

where $x can be number of digits

Eg.substr(str_shuffle("0123456789"), 0, 5);

Results after a couple of executions

9845079324230170431726479

You can use the same code to generate random string also, like this

$randomNum=substr(str_shuffle("0123456789abcdefghijklmnopqrstvwxyzABCDEFGHIJKLMNOPQRSTVWXYZ"), 0, $x);

Results with $x = 11

FgHmqpTR3OxO9BsNgcPJDb1v8Aw5b6H7fhaH40dmAxZf0EpvHL5lTKr