config.php

<?php
// 减肥记录管理系统 - 配置文件
define('DB_FILE', __DIR__ . '/database/weight_tracker.db');
define('APP_NAME', '减肥记录管理系统');
define('APP_VERSION', '1.1.0');

define('CACHE_DIR', __DIR__ . '/cache');
define('CACHE_DEFAULT_TTL', 300);
define('CSRF_TOKEN_EXPIRE', 3600);

if (!is_dir(CACHE_DIR)) {
    @mkdir(CACHE_DIR, 0755, true);
}

if (isset($_SERVER['REMOTE_ADDR']) && ($_SERVER['REMOTE_ADDR'] === '127.0.0.1' || $_SERVER['REMOTE_ADDR'] === '::1')) {
    error_reporting(E_ALL);
    ini_set('display_errors', 1);
    ini_set('log_errors', 1);
    ini_set('error_log', __DIR__ . '/error.log');
} else {
    error_reporting(0);
    ini_set('display_errors', 0);
    ini_set('log_errors', 1);
    ini_set('error_log', __DIR__ . '/error.log');
}

set_error_handler(function($errno, $errstr, $errfile, $errline) {
    if (!(error_reporting() & $errno)) {
        return false;
    }
    $errorTypes = [
        E_ERROR => 'Error',
        E_WARNING => 'Warning',
        E_PARSE => 'Parse',
        E_NOTICE => 'Notice',
        E_CORE_ERROR => 'Core Error',
        E_CORE_WARNING => 'Core Warning',
        E_COMPILE_ERROR => 'Compile Error',
        E_COMPILE_WARNING => 'Compile Warning',
        E_USER_ERROR => 'User Error',
        E_USER_WARNING => 'User Warning',
        E_USER_NOTICE => 'User Notice',
        E_STRICT => 'Strict',
        E_RECOVERABLE_ERROR => 'Recoverable Error',
        E_DEPRECATED => 'Deprecated',
        E_USER_DEPRECATED => 'User Deprecated'
    ];
    $type = $errorTypes[$errno] ?? 'Unknown Error';
    $logMessage = date('Y-m-d H:i:s') . " [$type] $errstr in $errfile on line $errline";
    error_log($logMessage);
    return true;
});

set_exception_handler(function($exception) {
    $message = $exception->getMessage();
    $file = $exception->getFile();
    $line = $exception->getLine();
    $trace = $exception->getTraceAsString();
    
    $logMessage = date('Y-m-d H:i:s') . " [Exception] $message in $file:$line\nStack trace:\n$trace";
    error_log($logMessage);
    
    if (!headers_sent()) {
        header('Content-Type: application/json; charset=utf-8');
        http_response_code(500);
        echo json_encode([
            'success' => false,
            'message' => '系统内部错误，请稍后重试'
        ], JSON_UNESCAPED_UNICODE);
    }
});

register_shutdown_function(function() {
    $error = error_get_last();
    if ($error !== null && in_array($error['type'], [E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR])) {
        $logMessage = date('Y-m-d H:i:s') . " [Fatal] {$error['message']} in {$error['file']} on line {$error['line']}";
        error_log($logMessage);
    }
});

function isMobileDevice() {
    $userAgent = isset($_SERVER['HTTP_USER_AGENT']) ? strtolower($_SERVER['HTTP_USER_AGENT']) : '';
    
    $mobileKeywords = [
        'mobile', 'android', 'iphone', 'ipad', 'ipod', 
        'blackberry', 'windows phone', 'opera mini', 
        'palm', 'smartphone', 'iemobile', 'kindle',
        'tablet', 'touch', 'phone'
    ];
    
    foreach ($mobileKeywords as $keyword) {
        if (strpos($userAgent, $keyword) !== false) {
            return true;
        }
    }
    
    return false;
}

function isTabletDevice() {
    $userAgent = isset($_SERVER['HTTP_USER_AGENT']) ? strtolower($_SERVER['HTTP_USER_AGENT']) : '';
    
    $tabletKeywords = ['ipad', 'tablet', 'android', 'kindle'];
    
    foreach ($tabletKeywords as $keyword) {
        if (strpos($userAgent, $keyword) !== false && strpos($userAgent, 'mobile') === false) {
            return true;
        }
    }
    
    return false;
}

function zhWeekday($date) {
    $w = date('w', strtotime($date));
    $map = ['周日','周一','周二','周三','周四','周五','周六'];
    return $map[$w];
}
?>