Generating random results by weight in PHP?

Question

I know how to generate a random number in PHP but lets say I want a random number between 1-10 but I want more 3,4,5\'s then 8,9,10\'s. How is this possible? I would post wh

Answer 1

/**
 * @param array $weightedValues
 * @return string
 */
function getRandomWeightedElement(array $weightedValues)
{
    $array = array();

    foreach ($weightedValues as $key => $weight) {
        $array = array_merge(array_fill(0, $weight, $key), $array);
    }

    return $array[array_rand($array)];
}

getRandomWeightedElement(array('A'=>10, 'B'=>90));

This is very easy method. How get random weighted element. I fill array variable $key. I get $key to array $weight x. After that, use array_rand to array. And I have random value ;).