PHP random_int() Function – Generate Random Integers in PHP

To generate a random integer using php, you can use the php random_int() function.

echo random_int(0,100); // Output: 54

Random number generation with php is easy to do.

If you want to generate random integers, you can use rand(), but if you want to generate cryptographically secure integers, then you can use the php random_int() method.

The php random_int() method generates cryptographically secure random integers.

To use random_int(), pass two integers. Then random_int() will return a random integer between those integers.

Below are some examples showing you how to use random_int() in PHP.

echo random_int(0,100); // Output: 63

Generating Random Integers with random_int() in a Range in php

Generating random integers in a range of numbers using php is very easy. We can use the rand() or mt_rand() and pass the two numbers of our range to the function.

If we want to generate an integer with random_int() between 0 and 100, we can do so with the following php code:

echo random_int(0,100); // Output: 72

Using random_int() to Generate Random Integers in a Loop

Being able to generate one random integer is great, but what if we want to generate many random integer?

We can generate multiple random integers with php by using the rand() function and putting it in a loop.

Let’s generate 10 random integers between 0 and 1 and stick them in an array.

$random_array = array();

for ($x = 0; $x < 10; $x++) {
  array_push($random_array,random_int(0, 100));
}

print_r($random_array);

// Output:
Array
(
    [0] => 6
    [1] => 25
    [2] => 73
    [3] => 80
    [4] => 24
    [5] => 3
    [6] => 97
    [7] => 44
    [8] => 100
    [9] => 31
)

Hopefully this article has been useful for you to understand how to generate random integers with random_int() using php.