已经安装所有php_pdo扩展依旧报错，该如何解决

Question

Fatal error: Uncaught exception 'PDOException' with message 'could not find driver'

这是我的pdo部分

extension=php_pdo_mysql.dll
extension=php_pdo_firebird.dll
extension=php_pdo.dll
extension=php_pdo_oci.dll
extension=php_pdo_odbc.dll
extension=php_pdo_pgsql.dll
extension=php_pdo_sqlite.dll

这是db.php页面

$pdo = new PDO('mysql:host=localhost;dbname=cms','root','');
$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES,false);
return $pdo;

这是user.php页面

$pdo = require __DIR__.'/db.php';
    class User{
        /**
         * 数据库连接句柄
         * @var
         * 
        */
        private $_db;
        
        /**
         * 构造方法
         * User constructor
         * @params PDO $_db PDO连接句柄
        */
        public function _construct($_db){
            $this->_db = $_db;
        }
        
        
        public function isExists($username){
            $sql = 'select * from `user` where `username` = :username';
            $stmt = $this->_db->prepare($sql);
            $stmt->bindParam(':username',$username);
            $stmt->execute();
            $result = $stmt->fetch(PDO::FETCH_ASSOC);
            return !empty($result);
        }
    }
    $user = new User($pdo);
    $ret = $user->isExists("admin");
    echo $ret;

这是phpinfo的输出信息

Answer 1

<?php
phpinfo();

把输出贴出来看看