PHP Data Objects (PDO) Step By Step Tutorial - Part 2: Now, we try to activate this extension. These steps to activate/check whether PDO extension active or not.
To use PDO, check whether PDO extension exist or not. Try to open your php extension folder. For example, in my computer, the directory: app/php5/ext.
Then, open your php.ini. Usually within c:/windows (depend on your php installation). Uncomment at line extension=php_pdo.dll, extension=php_pdo_mysql.dll. If still not exist, write them.
Restart your apache. You can restart from services. If, you use windows XP, you can access from start > control panel > Performance and Maintenance > Administrative Tools > Services. Find apache, then click restart.