我上传到网络托管时PDO不运行？

Question

mysql is deprecated and people recommend PDO over mysqli. I followed tutorials to connect a submission form with a database and it worked on my localhost (I use xampp), but when I upload them to some free web hosting services, the PHP works, except when it uses PDO (e.g. when connecting to database).

I have tried quite many free hosting services but PDO doesn't work everywhere. I wonder if this is normal, is there any free hosting service that supports PDO, or do I have to do something for the PDO to work ? But I didn't do anything to my localhost server and it worked.

Answer 1

It seems like PDO Is not available, you can do something like this to check if PDO is installed/exists.

if(class_exists('PDO')){
 echo "PDO exists";
}else{
echo "PDO does not exist"; 
}

or

var_dump(get_declared_classes()) -- and see if PDO is there.