How can a common codebase be maintained while allowing for individual configurations for multiple users in a PHP CMS?

To maintain a common codebase while allowing for individual configurations for multiple users in a PHP CMS, you can utilize configuration files that store user-specific settings. Each user can have their own configuration file that overrides the default settings in the common codebase. By dynamically loading the user's configuration file based on their identity or preferences, you can personalize the CMS experience for each user without modifying the core code.

// Load common configuration settings
$commonConfig = include 'common_config.php';

// Get user-specific configuration file based on user ID or preferences
$userConfigFile = 'user_' . $userId . '_config.php';

// Check if user-specific configuration file exists
if (file_exists($userConfigFile)) {
    // Load user-specific configuration settings
    $userConfig = include $userConfigFile;
    
    // Merge user-specific settings with common settings
    $config = array_merge($commonConfig, $userConfig);
} else {
    // Use only common configuration settings
    $config = $commonConfig;
}

// Use $config array for user-specific configurations throughout the CMS