Fatal error: Uncaught TypeError: implode(): Argument #1 ($array) must be of type array, string given in /var/www/sites/practicatest/public_html/application/Controller.php:113 Stack trace: #0 /var/www/sites/practicatest/public_html/application/Controller.php(113): implode() #1 /var/www/sites/practicatest/public_html/controllers/crController.php(433): Controller->_get_cache_test() #2 /var/www/sites/practicatest/public_html/controllers/crController.php(268): crController->_generic_examen() #3 /var/www/sites/practicatest/public_html/application/Bootstrap.php(51): crController->examen_teorico_cosevi() #4 /var/www/sites/practicatest/public_html/index.php(52): Bootstrap::run() #5 {main} thrown in /var/www/sites/practicatest/public_html/application/Controller.php on line 113