<?phpclass functions{
//随机生成0.1到10的随机数
public static function getNumber(){
$arr = ['0.1','0.2','0.3','0.4','0.5','0.6','0.7','0.8','0.9','1','1.1','1.2','1.3','1.4','1.5','1.6','1.7','1.8','1.9','2','2.1','2.2','2.3','2.4','2.5','2.6','2.7','2.8','2.9','3','3.1','3.2','3.3','3.4','3.5','3.6','3.7','3.8','3.9','4','4.1','4.2','4.3','4.4','4.5','4.6','4.7','4.8','4.9','5','5.1','5.2','5.3','5.4','5.5','5.6','5.7','5.8','5.9','6','6.1','6.2','6.3','6.4','6.5','6.6','6.7','6.8','6.9','7','7.1','7.2','7.3','7.4','7.5','7.6','7.7','7.8','7.9','8','8.1','8.2','8.3','8.4','8.5','8.6','8.7','8.8','8.9','9','9.1','9.2','9.3','9.4','9.5','9.6','9.7','9.8','9.9','10'];
$rand_keys = array_rand($arr, 1);
$number = $arr[$rand_keys];
return $number;
}}print_r(self::getNumber());exit();12345678910111213
测试结果