如何获取带有两个列的连续数组？

Question

我正在使用mysqli_fetch_array提取100行，并放入col-md-6。

但是如何在50行之后触发换行，以便有两个col-md-6以获得更好的视图？

  this.notificationOpenedListener = firebase.notifications().onNotificationOpened((notificationOpen) => {
      Linking.openURL('https://www.google.com/');
  });

  /*
  * If your app is closed, you can check if it was opened by a notification being clicked / tapped / opened as follows:
  * */
  const notificationOpen = await firebase.notifications().getInitialNotification();
  if (notificationOpen) {
      Linking.openURL('https://www.google.com/');
  }

Answer 1

只需使用一个计数器即可。

<div class="row">
    <div class="col-md-6">
       <?php
         $i = 1; 
         while($row = mysqli_fetch_array($sql)) {
            echo '<input type="checkbox">', $row['name'], '</input>';
            if($i++ == 50) echo '</div>', PHP_EOL, '<div class="col-md-6">', PHP_EOL;
         }
       ?>
    </div>
</div>

  

注意：$row['name']必须在回声引号或中打印出来。