PHP的foreach循環我做錯了什么

Question

例如，我有以下代碼

if ($result == 1) {
    foreach ($records as $record) {
        $request_date = $record['date'];
        $request_starttime = $record['start_time'];
        echo $request_date . " " . $request_starttime;
    }
    throw new UserException("Unfortunately, this slot is already booked,please check another slot");
} else {
    //do something else
}

此處的異常顯示良好，但該塊中之前的回顯代碼未顯示在頁面上。

我該如何實現？

print_r($slots)

Array
(
    [0] => 2018-12-12 12:45:00
)
Array
(
    [0] => 2018-12-12 12:45:00
    [1] => 2018-12-12 13:00:00
)
Array
(
    [0] => 2018-12-12 12:45:00
    [1] => 2018-12-12 13:00:00
    [2] => 2018-12-12 13:15:00
)
Array
(
    [0] => 2018-12-12 12:45:00
    [1] => 2018-12-12 13:00:00
    [2] => 2018-12-12 13:15:00
    [3] => 2018-12-12 13:30:00
)

我在throw new userException行之前添加了print_r($slots) 。

更詳細的代碼塊如下所示：

foreach ($order_item as $key => $value) {
                $order = new OrderItem();
                $class_info = ClassDuration::find()->where(['id' => $value['id']])->one();

                $end_date = date('Y-m-d', strtotime($model->create_date));

                //$p_price = $value['price'];

                $order->cd_id = $value['id'];
                $order->user_id = $UserId;
                $order->location_id = $value['location_id'];
                $order->instructor_id = $value['instructor_id'];
                                $order->date = $value['date1'];
                $order->start_time = $value['starttime'];
                $order->end_time = date("h:i",strtotime($value['endtime']));

                //$order->price = $p_price * $value['q'];
                $order->order_id = $model->id;
                                $instructor=$value['instructor_id'];
                                $date=$value['date1'];
                                $starttime =$value['starttime'];


                                $query = Yii::$app->db->createCommand("SELECT IF(EXISTS(SELECT * FROM `order_item` WHERE `instructor_id`='$instructor' and `date` = '$date'  AND `start_time` = '$starttime'), 1, 0)");
                                $query1 = Yii::$app->db->createCommand("SELECT * FROM `order_item` WHERE exists(select * FROM dual where `instructor_id`='$instructor' and `date` = '$date'  AND `start_time` = '$starttime')");
              $records=$query1->queryAll();
              $result=$query->queryScalar();
              //var_dump($result);exit;

              if ($result == 1) {
              foreach ($records as $record) {
              $request_date = $record['date'];
              $request_starttime = $record['start_time'];
              $slots[] = $request_date . " " . $request_starttime;

              }
                                print_r($slots);
                                $userMessage = "Unfortunately, this slot is already booked,please check another slot." . implode("<br />", $slots);
                                //throw new UserException($userMessage);   
                                //echo $userMessage;

                                }else{

                //$order->save();
                                }
                // $grand_total = $grand_total + $order->price;
                $ttl_dis = $ttl_dis;

            }

Answer 1

您試圖在$records內列出其他用戶已經預訂的已檢索插槽，作為您在異常中顯示的文本的一部分，如果正確，則該異常將不允許您顯示任何其他文本除了在異常消息中提到的內容之外，您應該在文本后附加異常消息，然后將其與消息一起顯示。

if ($result == 1) {
    foreach ($records as $record) {
        $request_date = $record['date'];
        $request_starttime = $record['start_time'];
        $slots[] = $request_date . " " . $request_starttime;
    }
    $userMessage = "Unfortunately, this slot is already booked,please check another slot." . implode("<br />", $slots);
    throw new UserException($userMessage);
} else {
    //do something else
}

更新

您應該先檢查插槽，然后再在模型中保存任何內容並重定向到視圖，請參見以下代碼，我向checkSlots()添加了一個額外的功能

public function actionCheckout() {

    if( Yii::$app->user->isGuest ){
        return $this->redirect(['/site/login-popup']);
    }

    $session = Yii::$app->session;
    $model = new Order();
    //$profile = UserProfile::findOne(24);//(['id' => 27])->all();//->where(['id'=>Yii::$app->user->identity->id])->one();
    $user = User::findOne(['id' => Yii::$app->user->identity->id]);
    $profile = UserProfile::findOne(['user_id' => Yii::$app->user->identity->id]);
    $billinginfo = UserBillingInfo::findOne(['user_id' => Yii::$app->user->identity->id]);
    $userchildren = UserChildren::findOne(['user_id' => Yii::$app->user->identity->id]);
    $modelsKids = $user->kids;
    //var_dump($modelsKids);exit;
    //Customer::findOne(10);
    // var_dump($profile->zipcode);exit;
    $model->status = "unpaid";
    $model->first_name = Yii::$app->user->identity->first_name;
    $model->last_name = Yii::$app->user->identity->last_name;
    $model->mobile = Yii::$app->user->identity->phone;
    $model->email = Yii::$app->user->identity->email;
    $model->address = isset($profile->street1) ? $profile->street1 : '';
    $model->city = isset($profile->city) ? $profile->city : '';
    $model->state = isset($profile->state) ? $profile->state : '';
    $model->post_code = isset($profile->zipcode) ? $profile->zipcode : '';



    $pp = new PaypalPayment();

    $st = Yii::$app->getTable;
    $site_name = $st->settings('general', 'site_name');

    if( Yii::$app->request->isAjax && $model->load(Yii::$app->request->post()) ){
        Yii::$app->response->format = Response::FORMAT_JSON;
        return ActiveForm::validate($model);
    }

    //$order_item = \Yii::$app->getRequest()->getCookies()->getValue('order_item');
    $order_item = $session['value'];

    if( count($order_item) <= 0 ){
        return $this->goHome();
    }

    $total = 0;

    for( $x = 0; $x < count($order_item); $x++ ){

        // $cart_p_p = $order_item[$x]['price'];
        // $total = $total + $cart_p_p * $order_item[$x]['q'];
    }

    if( Yii::$app->user->isGuest ){
        return $this->render('checkout', [
                    'model' => $model,
        ]);
    }


    $UserId = Yii::$app->user->identity->id;

    //check if all slots are available
    $allSlotsAvailable = $this->checkSlots($order_item);

    if( $model->load(Yii::$app->request->post()) && $allSlotsAvailable ){
        $user = User::findOne(['id' => Yii::$app->user->identity->id]);

        $profile = UserProfile::findOne(['user_id' => $user]);
        if( !empty($UserProfile) ){
            $profile = UserProfile::findOne(['user_id' => $user]);
        } else{
            $profile = new UserProfile();
        }

        $model->order_number = date('ymdhis');

        $model->create_date = date('Y-m-d H:i:s');
        $model->status = 1;
        $model->create_by = $UserId;
        // $model->order_amount = $total;
        //var_dump($_REQUEST);
        $user->phone = $_REQUEST['Order']['mobile'];
        $user->first_name = $_REQUEST['Order']['first_name'];
        $user->last_name = $_REQUEST['Order']['last_name'];
        $profile->user_id = $user->id;
        $profile->mobile = $_REQUEST['Order']['mobile'];
        $profile->street1 = $_REQUEST['Order']['address'];
        $profile->city = $_REQUEST['Order']['city'];
        $profile->state = $_REQUEST['Order']['state'];
        $profile->zipcode = $_REQUEST['Order']['post_code'];
        $profile->save(false);

        if( !empty($_REQUEST['Order']['kids']) ){
            $model->kids = serialize($_REQUEST['Order']['kids']);
        }
        $model->save();
        $user->save();

        $model->orderUpdate($model->id, 1, NULL);

        $grand_total = 0;
        $ttl_dis = 0;



        foreach( $order_item as $key => $value ){
            $order = new OrderItem();
            $class_info = ClassDuration::find()->where(['id' => $value['id']])->one();

            $end_date = date('Y-m-d', strtotime($model->create_date));

            //$p_price = $value['price'];

            $order->cd_id = $value['id'];
            $order->user_id = $UserId;
            $order->location_id = $value['location_id'];
            $order->instructor_id = $value['instructor_id'];
            $order->date = $value['date1'];
            $order->start_time = $value['starttime'];
            $order->end_time = date("h:i", strtotime($value['endtime']));

            //$order->price = $p_price * $value['q'];
            $order->order_id = $model->id;

            $order->save();

            // $grand_total = $grand_total + $order->price;
            $ttl_dis = $ttl_dis;
        }



        $model->order_amount = $grand_total;

        $model->save();


        $session->remove('date1');
        $session->remove('time1');

        Yii::$app->session->setFlash('orderPlaced');



        $link = '#';



        if( $model->payment_method == 'paypal' ){

            $new_array = $order_item;

            $pp->addMultipleItems($new_array);

            return $pp->getCheckoutForm($model->id);
        } elseif( $model->payment_method == 'invoice' ){

            $content = $this->renderPartial('_invoice', ['model' => $model]);
            //var_dump($content);
            $filename = 'web/customer-invoice/invoice' . $model->id . '.pdf';

            $pdf = new Pdf(['format' => Pdf::FORMAT_A4]);
            $mpdf = $pdf->api;
            $stylesheet = file_get_contents('themes/common/css/print/invoice.css');
            $mpdf->WriteHTML($stylesheet, 1);
            $mpdf->WriteHtml($content);
            $mpdf->Output($filename, 'F');

            $from_email = $st->settings('email', 'from_email');
            $from_name = $st->settings('email', 'from_name');

            $user = User::findOne($UserId);

            $to = $user['email'];

            $email_template = $st->email_template(10);

            \Yii::$app->mailer->compose('template', ['id' => 10, 'user_id' => $UserId,
                        'email_template' => $email_template,
                        'model' => $model,
                        'link' => $link])
                    ->setFrom([$from_email => $from_name])
                    ->setTo($to)
                    ->setSubject($email_template['subject'] . ' ' . $site_name)
                    ->attach($filename)
                    ->send();
        } elseif( $model->payment_method == 'booking' ){
            $admin = User::find()->select('email')->where(['user_role' => 'admin'])->asArray()->all();
            $admin = ArrayHelper::getColumn($admin, 'email');


            $content = $this->renderPartial('_booking', ['model' => $model]);
            //  var_dump($content);
            $filename = 'web/customer-booking/booking' . $model->id . '.pdf';

            $pdf = new Pdf(['format' => Pdf::FORMAT_A4]);
            $mpdf = $pdf->api;
            $stylesheet = file_get_contents('themes/common/css/print/invoice.css');
            $mpdf->WriteHTML($stylesheet, 1);
            $mpdf->WriteHtml($content);
            $mpdf->Output($filename, 'F');

            $from_email = $st->settings('email', 'from_email');
            $from_name = $st->settings('email', 'from_name');

            $user = User::findOne($UserId);
            $orderid = Order::find(['created_by' => $user->id])->select('id')->orderBy('create_date DESC')->one();
            $instructor_id = OrderItem::find()->select('instructor_id')->where(['order_id' => $orderid])->distinct();
            $Instructor = User::findOne($instructor_id);
            // var_dump($instructor_id);exit;
            // $admin = ArrayHelper::getColumn($admin, 'email');

            $to = $user['email'];
            $instructor_email = $Instructor['email'];
            $admin[] = $to;
            $admin[] = $instructor_email;
            //  $to .= $Instructor['email'];

            $email_template = $st->email_template(10);

            \Yii::$app->mailer->compose('template', ['id' => 10, 'user_id' => $UserId,
                        'email_template' => $email_template,
                        'model' => $model,
                        'link' => $link])
                    ->setFrom([$from_email => $from_name])
                    ->setTo($admin)
                    ->setSubject($email_template['subject'] . ' ' . $site_name)
                    ->attach($filename)
                    ->send();
        }

        //Yii::$app->response->cookies->remove('order_item');
        unset($session['value']);

        return $this->redirect(Yii::getAlias('@web') . '/order/view?id=' . $model->id);
        //return $this->redirect('result');
    } else{
        return $this->render('checkout', [
                    'model' => $model,
                        //  'modelsKids' => (empty($modelsKids)) ? [new UserChildren] : $modelsKids,
        ]);
    }
}

private function checkSlots($order_items) {
    $slots = [];
    foreach( $order_items as $item ){
        $instructor = $item['instructor_id'];
        $date = $item['date1'];
        $starttime = $item['starttime'];

        $query = Yii::$app->db->createCommand("SELECT IF(EXISTS(SELECT * FROM `order_item` WHERE `instructor_id`='$instructor' and `date` = '$date'  AND `start_time` = '$starttime'), 1, 0)");
        $result = $query->queryScalar();
        if( $result == 1 ){
            $slots[] = $date . " " . $starttime;
        }
    }

    if( sizeof($slots) ){
        Yii::$app->session->setFlash('error', "Unfortunately, this slot is already booked,please check another slot<br />".implode("<br />", $slots));
        return false;
    } else{
        return true;
    }
}

在函數checkSlots($order_items)您將看到我刪除了您的一個查詢

$query1 = Yii::$app->db->createCommand("SELECT * FROM `order_item` WHERE exists(select * FROM dual where `instructor_id`='$instructor' and `date` = '$date'  AND `start_time` = '$starttime')"); 

作為非必要的檢索相同的記錄date和start_time您正在使用查詢，只是使用的結果，從第一個查詢並添加日期和開始時間為$slots ，一旦所有的記錄進行檢查，如果有如果有任何保留的插槽，則該方法將返回false，並且將顯示隨視圖顯示的Flash消息，其中將顯示所有保留的插槽。