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:70 Stack trace: #0 /var/www/sites/practicatest/public_html/application/Controller.php(70): implode() #1 /var/www/sites/practicatest/public_html/controllers/aecomController.php(577): Controller->_get_cache_test() #2 /var/www/sites/practicatest/public_html/controllers/aecomController.php(287): aecomController->_generar_examenes() #3 /var/www/sites/practicatest/public_html/application/Bootstrap.php(51): aecomController->cursos() #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 70