Default error handling mode

1，PDO::ERRMODE_SILENT
This is the default mode. PDO will set simple error codes on the statement and database objects. You can use the PDO->errorCode() and PDO->errorInfo() methods to check for errors;
 If the error occurs when calling the statement object As a result, you can use the PDOStatement->errorCode() or PDOStatement->errorInfo() method on that object to obtain the error information. ## # If the error is caused when calling the database object, you should call those two methods on the database object.

The code is as follows:

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/3/5 0005
 * Time: 上午 9:23
 */
header("Content-Type:text/html;charset=utf-8");
//mysql:host:localhost;port=3306;dbname=php;charset=utf-8
$dbms='mysql';
$host='localhost';
$port='3306';
$dbname='php';
$charset='utf-8';
//用户名与密码
$user='root';
$pwd='root';
$dsn="$dbms:host=$host;port=$port;dbname=$dbname;charset=$charset";
try{
    $pdo=new PDO($dsn,$user,$pwd);
    //设置错误处理
    $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_SILENT);   //0 默认模式
//    $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_WARNING);  //1
//    $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);//2
//    $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ATTR_ERRMODE);     //3
    //预处理sql语句
    $stmt=$pdo->prepare("select *from phpbook");
    $stmt->execute();
    //获取错误信息
    $code=$stmt->errorCode();
    $info=$stmt->errorInfo();
    //输出相关信息
    print_r("错误码:".$code."<br>");
    print_r("错误信息:");
    print_r($info);
}catch (PDOException $exception){
    echo $exception->getMessage().'<br>';
}

If the database is not created, the execution result of the phpbook table is as follows: