CodeIgniter PDO数据库驱动程序无法正常工作

Question

我正在尝试在我的CodeIgniter应用程序中使用PDO MySQL驱动程序.这是我的数据库配置:

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'testdatabase';
$db['default']['dbdriver'] = 'pdo';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

但是,当我加载控制器时,我收到此错误:

致命错误:C:\ xampp\htdocs\testsite\system\database\drivers\pdo\pdo_driver.php中带有"无效数据源名称"消息的未捕获异常"PDOException":114

我已经使用die($this->hostname);in 检查了数据源pdo_driver.php,结果如下:

localhost;dbname=testdatabase

所以它获得了正确的数据库名称.数据库存在,我确实在运行MySQL.

这可能会出错？谢谢.

Answer 1

在文件/application/config/database.php的位置

$db['default']['hostname'] = 'localhost';

一定是

$db['default']['hostname'] = 'mysql:host=localhost';

localhost或您的数据库主机.

Answer 2

情况并非如此.

localhost;dbname=testdatabase

应该

mysql:dbname=testdatabase;host=localhost;

Answer 3

PDO驱动程序需要提供完整的DSN字符串.像这样的字符串

'dsn' = ‘mysql:host=localhost;dbname=databasename’;

当您使用此字符串时,您应该从数组中删除host和databasename值.我想下面的例子给你一个想法.

$db['default'] = array(
'dsn'   => 'mysql:host=localhost;dbname=codeigniter3',
'hostname' => '',
'username' => 'root',
'password' => '',
'database' => '',
'dbdriver' => 'pdo',
'dbprefix' => '',
'pconnect' => FALSE,
'db_debug' => TRUE,
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE
);

谢谢