Question

How to generate random floating point numbers in PHP

Answer 1

// Function to generate N random numbers in the range [lower, upper]
function generateRandomNumbers(int $n, float $lower, float $upper): array {
    $numbers = [];

    for ($i = 0; $i < $n; $i++) {
        $num = $lower + ($upper - $lower) * mt_rand() / mt_getrandmax();
        $numbers[] = $num;
    }

    return $numbers;
}

$n = 10;
$lower = 0.0;
$upper = 3.0;

$randomNumbers = generateRandomNumbers($n, $lower, $upper);

foreach ($randomNumbers as $num) {
    printf("%.6f ", $num);
}

  
  
/*
run:
    
0.664432 2.656831 1.811651 2.693126 0.269589 0.637861 2.005908 2.323283 2.558939 1.002481 

*/

 

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