Question

我在调用函数

时遇到问题

$ categ-＆GT; categ_body（）

第二次参数不会改变

$categ = new Categories("Autos & Vehicles"); 

$categ->categ_body(60*60*24);
$adm_json_arr["a_v_num_last_24_h_videos"] = $categ->body_vid_num;

// last 7 days
$categ->categ_body(60*60*24*7);
$adm_json_arr["a_v_num_last_7_d_videos"] = $categ->body_vid_num;

我需要做什么，所以当我调用函数时要更改参数或者我必须再次调用该类

function categ_body($time){
        require $_SERVER["DOCUMENT_ROOT"] . '/include/database/connect_cnt.php';
        $time2 = time() - ($time *2);
        $this->time = $time;
        $time = time() - $time;

        $stmt = $conn->prepare("SELECT COUNT(Id) AS Id_count FROM video WHERE Category = '" .$this->categ. 
                               "' AND Published = '1' AND Date > '" .$time. "'");

        $stmt->execute();
        $stmt->store_result();
        $stmt->bind_result($ctg_last_videos);
        $stmt->fetch();

        $this->body_vid_num = number_format($ctg_last_videos);
 }

所有问题都在于$ time的参数

60 * 60 * 24

并且不会更改为

60 * 60 * 24 * 7

Answer 1

有类似吸气剂和二传手的东西：

class Categories{
 public $body_vid_num;

 public function setBodyVidNum($num){
   // some process or logic
   ...
   $this->body_vid_num = $some_value;
 }

 public function getBodyVidNum(){
   return $this->body_vid_num;
 }

}

然后使用它：

$categ->setBodyVidNum(60*60*24);
$adm_json_arr["a_v_num_last_24_h_videos"] = $categ->getBodyVidNum();

// last 7 days
$categ->setBodyVidNum(60*60*24*7);
$adm_json_arr["a_v_num_last_7_d_videos"] = $categ->getBodyVidNum();

Answer 2

我首先更改categ_body（）函数以接收mysql DATE_SUB间隔文本而不是秒数。然后，我会修改查询以利用它。然后，为了使它只进行一次调用，我将返回我赋给类变量的值。

function categ_body($time = '24 HOUR'){
    require $_SERVER["DOCUMENT_ROOT"] . '/include/database/connect_cnt.php';

    $stmt = $conn->prepare("SELECT COUNT(Id) AS Id_count FROM video WHERE Category = '" .$this->categ.
    "' AND Published = '1' AND Date > UNIX_TIMESTAMP(DATE_SUB(NOW(),INTERVAL {$time}))");

    $stmt->execute();
    $stmt->store_result();
    $stmt->bind_result($ctg_last_videos);
    $stmt->fetch();

    $this->body_vid_num = number_format($ctg_last_videos);
    return number_format($ctg_last_videos);
}

现在，您只需调用该函数一次并传入正确的参数：

// No need to pass in a param here, since we set the default value of time
// to '24 HOUR'
$adm_json_arr["a_v_num_last_24_h_videos"] = $categ->setBodyVidNum();
$adm_json_arr["a_v_num_last_7_d_videos"] = $categ->setBodyVidNum('7 DAY');

从设定者那里返回一个值是不正常的，但这并不是一件坏事。如果您觉得自己更喜欢传统风格，那么您可以随时做到：

// No need to pass in a param here, since we set the default value of time
// to '24 HOUR'
$categ->setBodyVidNum();
$adm_json_arr["a_v_num_last_24_h_videos"] = $categ->getBodyVidNum();

$categ->setBodyVidNum('7 DAY');
$adm_json_arr["a_v_num_last_7_d_videos"] = $categ->getBodyVidNum();

Answer 3

您在Categ_body（）函数中做了什么？

您需要在该函数中设置body_vid_num。

Answer 4

你可以尝试

$adm_json_arr["a_v_num_last_24_h_videos"] = $categ->categ_body(60*60*24);
$adm_json_arr["a_v_num_last_7_d_videos"] = $categ->categ_body(60*60*24*7);

用新参数再次调用php类函数

4 个答案: