PHP 冒泡排序方法

public function getrandSecond(){
        $second= array();
        for($j=0;$j<10;$j++){
            $second[] = rand(1,59);
        }
        $len = count($second);
        for($i=0;$i<$len-1;$i++){
            for($k=0;$k<$len-1-$i;$k++){
                if($second[$k]>$second[$k+1]){
                    $temp = $second[$k];
                    $second[$k] = $second[$k+1];
                    $second[$k+1] = $temp;
                }
            }
        }
        return $second;
    }