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Fatal error: Uncaught Error: Undefined constant PDO::MYSQL_ATTR_INIT_COMMAND in /home/o3t21ioyc5o3/public_html/certificado/core/Database.php:16 Stack trace: #0 /home/o3t21ioyc5o3/public_html/certificado/index.php(22): Database->__construct() #1 {main} thrown in /home/o3t21ioyc5o3/public_html/certificado/core/Database.php on line 16