Connection falied: could not find driver - php

Question

I'm on Windows 10 and I'm using WAMP. I am trying to create a login form with prepared PDO statements. Below is the code to my connect.php script that is issuing the error: "Connection failed: could not find driver".
<?php
$server = 'localhost';
$username = 'root';
$password = '';
$db = 'login';
try{
$conn = new PDO("mysqli:host=$server;dbname=$db", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo "Connected Successfully";
}catch(PDOException $e){
echo "Connection falied: " . $e->getMessage();
}
?>
This is a list from my php.ini file that shows and DLLs associated with pdo
extension=php_openssl.dll
extension=php_pdo_firebird.dll
extension=php_pdo_mysql.dll
extension=php_pdo_oci.dll
extension=php_pdo_odbc.dll
extension=php_pdo_pgsql.dll
extension=php_pdo_sqlite.dll
extension=php_pdo_mysql.dll
extension=php_pdo.dll
extension=php_pdo_pgsql.dll
extension=php_pdo_sqlite.dll
extension=php_pgsql.dll
;extension=php_shmop.dll
WAMP says "no dll file" for:
-php_mysqli
-php_pdo
I have the "php_pdo" dll file in wamp/bin/php5.6.25/ and in wamp/bin/php5.6.25/ext/ just in case.
I can't find a download for php_mysqli but I don't think I need that for PDO, though it would be nice to have if anyone has a download link.
So my question is, did I just install the dll file into the wrong directory, or what? I'm not sure what to do, But I just installed WAMP and I can't use PDO. Should I use another client(I'm not sure what they are called).

Answer 1

I think you have a typo, try mysql instead of msqli:
$conn = new PDO("mysql:host=$server;dbname=$db", $username, $password);
Also from comments:
Try to put this in the php.ini : extension_dir = "c:\php5\ext" and point to the extension
move php_pdo.dll before the other PDO extensions, and restart WAMP

Answer 2

Edit: I decided to change my answer to be a community wiki, since I feel there should not be any rep that should come of this. Plus, the question being a typo on more than one count.
Original answer:
The syntax is:
mysql:host
and not mysqli. I hope this isn't another "typo" as per your original post https://stackoverflow.com/revisions/40444027/1 of new PDO("msqli:host
$dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass);
As per the manual:
http://php.net/manual/en/pdo.connections.php
Note: Wamp should be ready to use "out of the box" and not require any drivers to be added.
I use Wamp also and xampp and never had a problem.
Plus, Wamp installation comes in different flavours (32 and 64 bit), so make sure you chose the right one.
http://www.wampserver.com/en/
You can also try installing xampp
https://www.apachefriends.org/
Use error reporting also, which would have been of help here:
http://php.net/manual/en/function.error-reporting.php