PHP5.3 an unsuccessful solution for configuring PHP pdo mysql for the Yii php framework

Because the project needs to use the PHP Yii framework, some colleagues configured php and yii in the Yii framework and accessed the necessary webpage of the Yii component to show that mysql pdo has not been loaded: php has been checked. INI file, the component has been set to load: extension_dir = "ext" cgi. force_redirect = 0 extension = php_mbstring.dll extension = php_mysql.dllextension = Limit = limit after research and experiment, it is found that the extension_dir is the cause and must be set to an absolute path to load successfully: extension_dir = "D: /var/php53/ext "restart Apache, then open the Yii framework page, and display that the load is successful: