Exception 'could not find driver' while mi

Question

This my stack trace:

  Exception 'yii\db\Exception' with message 'could not find driver'

in /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Connection.php:534

#0 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Connection.php(836): yii\db\Connection->open()
        #1 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Connection.php(823): yii\db\Connection->getMasterPdo()
        #2 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Command.php(208): yii\db\Connection->getSlavePdo()
        #3 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Command.php(816): yii\db\Command->prepare(true)
        #4 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Command.php(350): yii\db\Command->queryInternal('fetchAll', NULL)
        #5 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/mysql/Schema.php(198): yii\db\Command->queryAll()
        #6 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/mysql/Schema.php(97): yii\db\mysql\Schema->findColumns(Object(yii\db\TableSchema))
        #7 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/db/Schema.php(140): yii\db\mysql\Schema->loadTableSchema('migration')
        #8 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/console/controllers/MigrateController.php(121): yii\db\Schema->getTableSchema('{{%migration}}', true)
        #9 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/console/controllers/BaseMigrateController.php(610): yii\console\controllers\MigrateController->getMigrationHistory(NULL)
        #10 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/console/controllers/BaseMigrateController.php(102): yii\console\controllers\BaseMigrateController->getNewMigrations()
        #11 [internal function]: yii\console\controllers\BaseMigrateController->actionUp(0)
        #12 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/base/InlineAction.php(55): call_user_func_array(Array, Array)
        #13 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/base/Controller.php(151): yii\base\InlineAction->runWithParams(Array)
        #14 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/console/Controller.php(91): yii\base\Controller->runAction('', Array)
        #15 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/base/Module.php(455): yii\console\Controller->runAction('', Array)
        #16 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/console/Application.php(161): yii\base\Module->runAction('migrate', Array)
        #17 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/console/Application.php(137): yii\console\Application->runAction('migrate', Array)
        #18 /opt/lampp/htdocs/advanced/vendor/yiisoft/yii2/base/Application.php(375): yii\console\Application->handleRequest(Object(yii\console\Request))
        #19 /opt/lampp/htdocs/advanced/yii(31): yii\base\Application->run()
        #20 {main}

I am new to yii2. I have added database name,username in advaced/common/config/main-local.php. Using xampp webserver and version of php is 5.6.8 and PDO is also enabled.

This is my db configuration.

'db' => [
        'class' => 'yii\db\Connection',
        'dsn' => 'mysql:host=localhost;dbname=yii2advanced',
        'username' => 'root',
        'password' => '',
        'charset' => 'utf8',
    ],

Answer 1

I had same error, but instead of xampp I used Fedora 25 with Apache, for me 'dnf install -y php-mysqlnd' fixed this error, so you are probably missing extension.

Answer 2

I solved this problem by changing PHP path like this

1. Go to "My Computer" right click and click "Properties"
2. Click "Advanced system settings"
3. Click "Environment Variables"
4. Find the "Path" in System variables, double click it.
5. Find your PHP Path or add it if you not have it yet, like "D:\xampp\php"
6. Click OK and restart your Apache server.
7. That's it, I can migrate db then.