PHP: Get random item from array

get_random_item_from_array.php

<?php

function float(float $min, float $max): float
{
    $random = \mt_rand() / \mt_getrandmax() * $max;
    return \max($random, $min);
}
    
function getRandomItem(array $array)
{
    $sumChance = 0.0000;
    $max = 0.0000;
    $maxIndex = 0;
    $rand = float(0, 100);
    
    foreach ($array as $index => $a) {
        if ($a['chance'] > $max) {
            $maxIndex = $index;
        }
        
        $sumChance += $a['chance'];
        
        if ($rand <= $sumChance) {
            return $a;
        }
    }
    
    return $array[$maxIndex];
}
    
$array = [
    ['chance' => 50.15, 'item' => 'item1'],
    ['chance' => 10.00, 'item' => 'item2'],
    ['chance' => 6.10, 'item' => 'item3'],
    ['chance' => 15.34, 'item' => 'item4'],
    ['chance' => 14.66, 'item' => 'item5'],
    ['chance' => 0.75, 'item' => 'item6'],
    ['chance' => 3, 'item' => 'item7'],
];


$res = [];
$c = 0;

while ($c++ < 100) {
    $randomValue = getRandomItem($arr)['item'];
    
    if (!isset($res[$randomValue])) {
        $res[$randomValue] = 0;
    }
    
    $res[$randomValue]++;
}

    
var_dump($res);