无法连接到数据库

chenxi

加载数据库后出现:   
A PHP Error was encountered
Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at D:\php\PHProot\blog\application\controllers\blog.php:10)

Filename: core/Common.php

Line Number: 414

A Database Error Occurred
Unable to select the specified database: blog

Filename: D:\php\PHProot\blog\system\database\DB_driver.php

Line Number: 140