Installing/Configuring
PHP Manual

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

PDO Configuration Options
Name Default Changeable Changelog
pdo.dsn.*   php.ini only  
For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

pdo.dsn.* string

Defines DSN alias. See PDO::__construct() for thorough explanation.


Installing/Configuring
PHP Manual