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PHP:
скопировать код в буфер обмена
<?PHP 
abstract class Logger{
        protected $massege;
        protected $log_time;
        protected $host = 'localhost';
        protected $user = 'root';
        protected $password = '123';
        protected $db = 'test';
        public function get_date($error){
                @$this->log_time = date("[Y-m-d H:i:s]").serialize($error);
        }
        public function write_log_in_file(){
        }
}
class FileLogger extends Logger{
        private $way = 'log.txt';
        public function write_log_in_file(){
                return file_put_contents($this->way, $this->log_time . "\n", FILE_APPEND);
        }
}
class DBLogger extends Logger{
        public function __construct($host = 'localhost', $user = 'root',$password = '123',$db = 'test'){
                $this->host = $host;
                $this->user = $user;
                $this->password = $password;
                $this->db = $db;
        }
        public function write_log_in_file(){
                $connect = mysqli_connect($this->host,$this->user,$this->password,$this->db);
                if (mysqli_connect_errno()) {
                printf("Connect failed: %s\n", mysqli_connect_error());
                exit();
                }
                $sql = mysqli_query($connect, "INSERT INTO Logg (massege) VALUES('error')");
                mysqli_close($connect);
        }
}
$Log = new FileLogger('/log.txt');
$Log->get_date('Error');
$Log->write_log_in_file();
$mysqliLog = new DBLogger();
$mysqliLog->write_log_in_file();
?>