PHP random big numbers?

Question

PHP

Hello. I need to generate a random number from 0 to ~2^63-1
How can this be done? Thanks in advance!

Answer 1

How can this be implemented?

1. You need to create a storage system for long integers or real numbers (fixed or floating point). Namely, programming.
2. Then, using the recreated random() function for the new numbers, generate random numbers.
3. Profit!

Answer 2

Find out what is the maximum number that can be obtained using getrandmax() , and if the limit does not suit you, then generate several numbers and concatenate them (like strings, I guess).
Something like:

$number = '';
$max = getrandmax();
while (strlen($number) < $n) {
  $number .= rand($max);
}