PHP随机浮点数

function randomFloat($min = 0, $max = 1) {
        $rand = mt_rand();
        $lmax = mt_getrandmax();
  return  $min +  $rand / $lmax * ($max - $min);
}

var_dump(randomFloat());
var_dump(randomFloat(1, 100000));

随机浮点数函数！