Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /users/aerandir/www/test/plottracker.php:80 Stack trace: #0 /users/aerandir/www/test/plottracker.php(80): implode('     ', '') #1 {main} thrown in /users/aerandir/www/test/plottracker.php on line 80