javascript - Yii2:将变量从 Controller 传递给javascript

Question

我正在为我的项目使用 Yii2 框架。我的 Controller 中有一个循环，这是代码

detailController.php:

public function actionResult() {
    $connection = \Yii::$app->db;
    $searchModel = new HeaderSearch();
    $dataProvider = new ActiveDataProvider([
        'query' => Header::find()->
                where(['user_id' => Yii::$app->user->identity->id]),
        'pagination' => [
            'pageSize' => 24,
        ],
    ]);
    
    $val = base64_decode($val);
    $txt = base64_decode($txt);
    $arrayVal = explode(",", $val);
    unset($arrayVal[count($arrayVal) - 1]);
    $arrayHeader = explode(",", $txt);
    unset($arrayHeader[count($arrayHeader) - 1]);
    $headerArray = null;
    for ($i = 0; $i < count($arrayVal); $i++) {
        $headerArray[$arrayVal[$i]] = $arrayHeader[$i];
    }
    $userId = Yii::$app->user->id;
    $modelUser = User::find()->where(['id' => $userId])->one();
    $parentId = $modelUser->parent_id;
    $sql = $connection->createCommand("SELECT list_header FROM customize_header WHERE user_id=$userId");
    $modelData = $sql->queryColumn();
    $arrayData = json_decode($modelData[0]); //all data in array form
    $countData = count($arrayData); // count rows of data except header row

    $modelUser = User::find()->where(['id' => Yii::$app->user->id])->one();
    $data = CustomizeHeader::find()->all();
    $command = "DELETE FROM header WHERE user_id = '$userId'";
    $query = Yii::$app->db->createCommand($command)->execute();

    foreach ($arrayHeader as $value) {
        $az = preg_replace('/^([0-9]{1,2})(_.*)/i', "\\2", $value);
        $data = ltrim($az, '_');
        $command = "INSERT INTO header(nama_header, user_id, parent_id) VALUES('$data', '$userId', '$modelUser->parent_id')";
        $query = Yii::$app->db->createCommand($command)->execute();
    }
    $countHeader = count($arrayHeader);    //count of selected header
    $j = 0;
    $point = floor($countData / 4);
    $percent = 0;
    for ($k = $j; $k < $countData; $k++) { 
        if($k % $point == 0 && $k > 0){      //Special Condition
            $percent = $percent + 10;        // Special Variable
        }
        $keyData = array_keys($arrayData[$k]);
        $countKeyData = count($keyData);      
        for ($x = $k; $x <= $countData; $x++) {
            foreach ($arrayHeader as $key => $value) {
                $headerId[] = preg_replace('/^([0-9]{1,2})(_.*)/i', "\\1", $value);
            }
            $n[$k] = [];
            for ($a = 0; $a < $countHeader; $a++) {
                for ($b = 0; $b < $countKeyData; $b++) {
                    if ($headerId[$a] == $keyData[$b]) {
                        $n[$k][] = $arrayData[$k][$b];
                    }
                }
            }
        }
    }
      //some code
    return $this->render('index', [
                'searchModel' => $searchModel,
                'dataProvider' => $dataProvider,
                'userId' => $userId,
    ]);

在上面的代码中，我有一个条件 if($k % $point == 0 && $k > 0) 我将评论标记为 Special Condition 包含一个变量 $percent，我将其注释标记为 Special Variable。每次条件为 true 时，我都想将此变量(包括值)发送到 upload.js。

所以变量会在 Action 处理的过程中实时发送到upload.js。

上传.js:

function displayResult() {
$('#progress').show();
var x = document.getElementById('bootstrap-duallistbox-selected-list_CustomizeHeader[list_header][]');
if (x.length == 24) {
    var txt = "";
    var val = "";
    for (var i = 0; i < x.length; i++) {
        txt += x[i].text + ",";
        val += x[i].value + ",";
    document.getElementById("progress").innerHTML="<div style=\"width:'percent';background-color:#ddd;\">&nbsp;</div>"; //Here
    }
    window.location = 'result?txt=' + btoa(txt) + '&val=' + btoa(val);
} else {
    alert("At least 24 Headers!");
}
}

我使用这个脚本在view.php中显示一个进度条，进度条的宽度(我设置的行代码注释标记为 Here) 取决于从 Controller 传递到此脚本的 $percent。

那么如何在 Action 执行期间从 PHP Javascript 实时传递变量？

知道如何解决这个问题吗？谢谢 :)

Answer 1

在这种情况下，您应该在返回数组中传递正确的值，然后在 View 中管理正确的使用
例如:假设您需要的值在 $percent var

中

在你的 Controller 中

   return $this->render('index', [
                  'searchModel' => $searchModel,
                  'dataProvider' => $dataProvider,
                  'userId' => $userId,
                  'percent' => $percent
      ]);

在您看来您可以检查是否正确使用

.......

  <?php  

     if ( $percent > 0) {
      echo "<div>". $percent . "</div>";
     }
  ?>

 .....