Executing multiple init commands rather than using PDO::MYSQL_ATTR_INIT_COMMAND.
PDO::MYSQL_ATTR_INIT_COMMAND does not support multiple commands as reported in https://bugs.php.net/bug.php?id=48859
Merge pull request #4328 from renan/3.0-mysql-multiple-init

Executing multiple init commands rather than using PDO::MYSQL_ATTR_INIT_COMMAND