PHP dir() 類遞迴讀取目錄結構：樹狀輸出完整範例

dir() 類基本用法

read()) {
        if ($file === '.' || $file === '..') continue;
        
        $path = "$directory/$file";
        if (is_dir($path)) {
            echo "<li><font color='#ff00cc'><b>$file</b></font></li>";
            tree($path);
        } else {
            echo "<li>$file</li>";
        }
    }
    echo "</ul>";
    $mydir->close();
}

echo "<h2>目錄為粉紅色</h2>";
tree(".");
?>

輸出結構

folder1

file1.txt
subfolder

file2.jpg


index.php

現代化改寫（SPL）

function tree_spl(string $dir): void {
    $iterator = new RecursiveIteratorIterator(
        new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS),
        RecursiveIteratorIterator::SELF_FIRST
    );
    
    echo "<ul>";
    foreach ($iterator as $file) {
        $depth = $iterator->getDepth();
        $indent = str_repeat("  ", $depth);
        $icon = $file->isDir() ? "📁 " : "📄 ";
        $close = $file->isDir() ? "" : "";
        echo "$indent
$icon{$file->getBasename()}$close
";
    }
    echo "</ul>";
}