Automated Maintenance (check_updates.php)

Overview

Pragma CMS separates the update-checking logic from the HTTP requests. Instead of slowing down the Admin UI by pinging external APIs on page load, a dedicated PHP CLI script runs in the background.

Execution

This script runs automatically via Cron at 04:00 and 16:00 under the www-data user to prevent cache permission conflicts.

To manually force an update check:

How It Works

1. CLI Security: The script immediately dies if accessed via a web browser (php_sapi_name() !== 'cli').
2. Minimal Bootstrapping: It loads only the absolute minimum classes required (Platform.php, Database.php, UpdateManager.php, Site.php) to keep RAM usage near zero.
3. Cross-Tenant Routing: If an update is found, the script queries the master database to get the list of active sites. It then iterates through each tenant's config_db.php, connects to their respective databases, and extracts the admin_email setting.
4. Deduplication & Dispatch: Admin emails are deduplicated (array_unique) to avoid spamming the same administrator. Notifications are then dispatched via PHPMailer using the Platform's Master SMTP settings.