Question

我试图弄清楚如何在while循环上方和num_rows检查的下方回显内容，但是在执行此操作之前，我需要从while循环中获取内容。

$sql = "SELECT * FROM table WHERE column = ?";
$stmt = $db->prepare($sql);
$stmt->bind_param('s', $test);
$result = $stmt->execute();
$stmt_result = $stmt->get_result();
if ($stmt_result->num_rows > 0) {
echo "<div id='wrapper'>"; //I need to add HTML content here if $status === 2
    while ($row = $stmt_result->fetch_assoc()) {
       $title = $row['title'];
       $description = $row['descript'];
       $status = $row['status'];
       if ($status === 2) {
          echo $status;
          continue; //skip to the next iteration
       }
       echo $title;
       echo $description;
    }
}

也许我错过了显而易见的事情。怎么做？

总而言之，这是我正在寻找的输出：

//if status !== 2: (i get 3 results)
<div id='wrapper'>
//title
//description

//title
//description

//title
//description
</div>
//if status === 2: (i get 1 result)
<div id='other_wrapper'>
//title
//description
</div>
//if status === 3: (i get 5 results)
<div id='yet_another_wrapper'>
//title
//description

//title
//description

//title
//description

//title
//description

//title
//description
</div>

Answer 1

也许这样对您有用。

将这些行替换为while循环

$rows = $stmt_result->fetch_all(MYSQLI_ASSOC);
foreach ($rows as $row) {
  if ($row['status'] === 2) {
    $title = $row['title'];
    $description = $row['descript'];
    $status = $row['status'];
    if ($status === 2) {
      echo $status;
      continue; //skip to the next iteration
    }
    echo $title;
    echo $description;
  }
}

Answer 2

尝试一下：

$idv =0;
if ($stmt_result->num_rows > 0) {
  while ($row = $stmt_result->fetch_assoc()) {
   if($row['status'] ==2 && $idv==0){
     $idv =1;
     echo "<div id='wrapper'>"; //adds div once only if status is 2
   }
   $title = $row['title'];
   $description = $row['descript'];
   $status = $row['status'];
   if ($status === 2) {
      echo $status;
      continue; //skip to the next iteration
   }
   echo $title;
   echo $description;
  }
}

Answer 3

上面的答案很好，但是有人提供了完美的解决方案：

$wrappers = [
   'wrapper' => [/* items from db with status not 2 or 3 */]
   'other_wrapper' => [/* items from db with status 2 */]
   'yet_another_wrapper' => [/* items from db with status 3 */]
];
function getWrapperNameForStatus($status) {
    if($status === 2) {
        return 'other_wrapper';
    }

    if($status === 3) {
        return 'yet_another_wrapper';
    }

    return 'wrapper';
}

$wrappers = [];
while ($row = $stmt_result->fetch_assoc()) {
    $wrapperName = getWrapperNameForStatus($row['status']);

    $wrappers[$wrapperName][] = [
        'title' => $row['title'],
        'description' => $row['description'],
        'status' => $row['status']
    ];
}

此解决方案的贷方转到https://www.phphelp.com/u/JimL。它很干净，使您能够在无限制的包装器中发布无限制的内容，并且可以防止代码重复。谢谢吉姆。

在while循环之前如何回显内容？

3 个答案: