如何防止catch中的自动显示pdo错误

I want to use try{} catch{} in PDO and display custom errors in catch, but errors sent automatically to the user and I do not control them.

For example, this is my code for connecting to the database

class cn{
    public static function connect( $dbName=NULL ){
        try{
            if( $dbName != NULL )
                $dbName = 'dbname='.$dbName;
            $con = new PDO(
                'mysql:host=localhost;'.$dbName,
                'myuser',
                'mypass',
                [
                    PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',
                    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION
                ]
            );
        }catch(PDOException $e){
            if($e->getCode() == 1049)
                echo 'not find';
            elseif($e->getCode() == x)
                echo 'ABC';
            elseif($e->getCode() == y)
                echo 'DEF';
            .
            .
            .
            else
                echo 'XYZ';

        }
        return $con;
    }
}

But the errors are displayed as shown in the image below.