Uso o sistema operacional linux com a base redhat, e ao pesquisar no arquivo php.ini, me retorna somente
[Pdo]
; Whether to pool ODBC connections. Can be one of "strict", "relaxed" or "off"
; http://php.net/pdo-odbc.connection-pooling
;pdo_odbc.connection_pooling=strict
;pdo_odbc.db2_instance_name
[Pdo_mysql]
; Default socket name for local MySQL connects. If empty, uses the built-in
; MySQL defaults.
pdo_mysql.default_socket=
