The CertChecker class helps to detect a domain SSL certification expiration. It sends a notification emails when checking failed or need a cert update.

Usage:

• Put the domain names into the domain.txt (every line should containt one domain name).
• Install dependencies running compose comand.
• Setup the config.ini file.
• Setup a cron job and run the cron_script.php (for example: every day, or every week at once)

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