Php framework-is thinkPHP written in DB_DSN in the pdo mode? is it mysql mode if it is not written?

{Code...} if this code is written in this way & #039; DB_DSN & #039;, the PDO connection will be automatically used, and the mysql connection will not be written & #039; DB_DSN & #039? Or are Pdo connections used no matter whether writing or not? Or how to set the connection with other parameters?

'Db _ type' => 'mysql', // Database TYPE 'DB _ user' => 'root', // username 'DB _ pwd' => '123 ', // password 'DB _ prefix' => 'think _ ', // database table PREFIX 'DB _ DSN' => 'MySQL: host = localhost; dbname = thinkphp; charset = utf8 ',//★★Note here.

If 'DB _ DSN 'is written in this way, the PDO connection is automatically used. if 'DB _ DSN' is not written, is the mysql connection?

Or are Pdo connections used no matter whether writing or not?

Or how to set the connection with other parameters?

Reply content:

'Db _ type' => 'mysql', // Database TYPE 'DB _ user' => 'root', // username 'DB _ pwd' => '123 ', // password 'DB _ prefix' => 'think _ ', // database table PREFIX 'DB _ DSN' => 'MySQL: host = localhost; dbname = thinkphp; charset = utf8 ',//★★Note here.

If 'DB _ DSN 'is written in this way, the PDO connection is automatically used. if 'DB _ DSN' is not written, is the mysql connection?

Or are Pdo connections used no matter whether writing or not?

Or how to set the connection with other parameters?

For versions earlier than TP3.2.3, ifDB_TYPEUsePDOType, the database type isDB_DSNDepends on the configuration. 3.2.3 or later versions,DB_DSNThis parameter is automatically set by the system. For version 3.2.3PDOMethod, soDB_TYPEThe actual database type needs to be configured and cannot be setPDOAnd are no longer differentiated.mysqlAndmysqli. Please refer to the document for help