在 PHP 中合并目录迭代器数组时出现问题

我对你的问题有点困惑，但我认为对于你要做的事情，你最好在 2D 数组中构建一个类似表格的数据结构，然后你可以迭代它以显示为表格。您可以一次性完成所有操作，但它将使您的代码更具可读性/可维护性，以分离数据采集和显示生成逻辑。

我还认为您在自己的脑海中用目录迭代器大大复杂化了这个问题。您真正要做的（基于您的示例输出）是检查目录列表顶层是否存在某些文件 - 在这种情况下，您需要做的就是迭代目录列表，然后迭代您正在寻找的文件列表。

我在这里也真的看不到 ArrayObject/ArrayIterator 中的意义，因为您没有修改正在使用的数组。您可以只循环数组本身。

这样：

已编辑以反映评论。您在这里需要的排序魔法来自array_multisort()。

// Don't forget to escape ' backslashes!
// Also, / works on Windows too...
$dirA = array(
  "D:''dir1",
  "D:''dir2",
  "D:''dir3",
  "D:''dir4"
);
// The list of files you are checking for
$files = array(
  'folder.jpg',
  'cover.jpg',
  'poster.jpg'
);
// The "columns" we want to sort by (highest priority first)
// This is equivalent to SQL: ORDER BY name ASC, path ASC
$sortCols = array(
  'name' => SORT_ASC,
  'path' => SORT_ASC
);
// This will be our results "table"
$results = array();
// This will hold the sort column items
$sortInfo = array();
foreach ($sortCols as $colName => $flags) {
  $sortInfo[$colName] = array();
}
// Loop parent directories
foreach ($dirA as $dir) {
  // Make a DirectoryIterator and loop it
  foreach (new DirectoryIterator($dir) as $child) {
    // Skip files and parent dir
    if (!$child->isDir() || $child->isDot()) {
      continue;
    }
    // Temp array to hold data about this sub-dir
    $result = array();
    $result['path'] = $child->getPathname();
    $result['name'] = basename($result['path']);
    // Now check for the existence of files in the file list
    // You might want to use is_file() instead of file_exists() since
    // it is possible for there to be a directory named 'folder.jpg'
    foreach ($files as $file) {
      $result[$file] = file_exists($result['path'].''''.$file);
    }
    // Create a "row" for this sub-directory
    $results[] = $result;
    // Create sort data for this directory
    foreach ($sortCols as $colName => $flags) {
      $sortInfo[$colName][] = $result[$colName];
    }
  } // foreach DirectoryIterator
} // foreach $dirA
// Now we have an array of "rows" corresponding to each sub-directory
// we can do some sorting magic with it.
// First we prepare the data to pass to array_multisort() as an array
// of arguments, which we can use with call_user_func_array(). This
// approach allows a dynamic number of sort columns.
$sortData = array();
foreach ($sortCols as $colName => $flags) {
  $sortData[] = $sortInfo[$colName];
  $sortData[] = $flags;
}
$sortData[] = &$results; // Last arg is passed by reference!
// Now we call it
call_user_func_array('array_multisort', $sortData);

// Now we output a table
echo "<table>'n";
// Header row
echo "<tr><th>Folder Name</th><th>Full Path</th>";
foreach ($files as $file) {
  echo "<th>$file</th>";
}
echo "</tr>'n";
// Data rows
foreach ($results as $row) {
  echo "<tr><td>{$row['name']}</td><td>{$row['path']}</td>";
  foreach ($files as $file) {
    echo $row[$file] ? "<td>Y</td>" : "<td>X</td>";
  }
  echo "</tr>'n";
}
echo "</table>";