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 |  | 
    
   
  
  
Here's a short explanation of
the configuration directives.
 
  
   - 
    pdo.dsn.*string
- 
    
     Defines DSN alias. See PDO::__construct for
     thorough explanation.