Setting up Doctrine DBAL to use UTF-8 in MySQL connections

bootstrap.php

<?php

use Doctrine\DBAL\Event\Listeners\MysqlSessionInit;

/* ... */
if(
    isset($options['encoding'])
    && $this->_em->getConnection()->getDriver() instanceof MysqlDriver
) {
    $this
        ->_em
        ->getEventManager()
        ->addEventSubscriber(new MysqlSessionInit(
            $options['encoding'],
            isset($options['collation']) ? $options['collation'] : false
        ));
}
/* ... */