Question

我是PHP新手。我已经编写了在目录中显示文件的代码，我需要按照修改日期（即上传日期）对文件进行排序，以显示修改过的文件在列表的顶部

这是我的代码

<?php

$path = $dpath.$lpath;

if ($handle = opendir($path)) {
    while (false !== ($file = readdir($handle))) {
        $dbfname = $path.$file;

        if ($file != "." && $file != "..") {
            $sql = "SELECT uploader, course FROM assignments WHERE filename = '$dbfname'";
            $result = $conn->query($sql);

            $row = $result->fetch_assoc();

            // echo '<a href="/prac/admin/">'.$file.'</a>'."<br>";
            echo '<tr>';
                echo '<td>';
                echo '<a href = "'.$path.$file.'"' .'download="'.$file.'">'.$file.'</a>'.'</td>';
                echo '<td>'.$row['course'].'</td>';
                echo '<td>'.$row['uploader'].'</td>';
                echo '<td>'.date('d M Y [H:i:s]', filemtime($path.$file)).'</td>'; 
                echo '<td>'.filesize($path.$file).' Bytes</td>';
            echo '</tr>';
        }
    }

    closedir($handle);
}

Answer 1

尝试一下。

首先，我们创建一个包含所有文件名的数组。然后，我们进行一个查询，并使用WHERE IN子句查找所有结果。我们告诉查询从上传日期开始按降序组织这些结果。

然后，我们使用适当的参数化Mysqli查询从数据库中获取结果。

一旦获得结果，我们便会遍历它们并填充您的表行。

别忘了用正确的列名替换查询中的字段值，否则将无法正常工作。

$path = $dpath . $lpath;

if ($handle = opendir($path)) {

  while (false !== ($file = readdir($handle))) {

    $dbfname = $path.$file;
    if ($file != "." && $file != "..") {

      $fileNames[] = $dbfname;

    }

  }

closedir($handle);

}

if($fileNames){

  $clause = implode(',', array_fill(0, count($fileNames), '?')); 
  $types = str_repeat('s', count($fileNames)); 
  //You will need to change date_field to the column that has the upload dateTime value stored in it.
  $sql = "SELECT uploader, course, date_field, filename FROM assignments WHERE filename IN ($clause) ORDER BY date_field DESC";
  $stmt = $conn->prepare($sql);
  $stmt->bind_param($types, ...$fileNames);
  $stmt->execute();
  $results = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);

}

if($results){

  foreach($results as $row){

    echo 
    '<tr>

      <td>
        <a href="'  . $row['filename'] . '"' . 'download="'  . basename($row['filename']) . '">'  . basename($row['filename']) . '</a>
      </td>' .

      '<td>'  . $row['course']  . '</td>' .

      '<td>'  . $row['uploader']  . '</td>' . 

      '<td>'  . date('d M Y [H:i:s]', strtotime($row['date_field'])) . '</td>' . //The date_time field is used here too. 

      '<td>'  . filesize($row['filename']) . '</td>' .

    '</tr>';


  }

}else{

  echo 
  '<tr><td>No results were found</td></tr>';

}

如何使用php按目录中的日期文件排序

1 个答案: