摘要：//这是我以前的连接方式 $con = mysqli_connect("localhost","web_user","password"); if (!$con) { die('Could not connect: '
//这是我以前的连接方式
$con = mysqli_connect("localhost","web_user","password");
if (!$con)
{
die('Could not connect: ' . mysqli_error($con));
}
var_dump($con);
//这是学过PDO之后的连接方式
$type = 'mysql';
$host = 'localhost';
$dbName = 'test';
$charset = 'utf8';
$dsn = $type.':host='.$host.';dbname='.$dbName.';charset='.$charset;
$user = 'web_user';
$pass = 'password';
try
{
$pdo = new PDO($dsn, $user, $pass);
}
var_dump($pdo);
批改老师：天蓬老师批改时间：2018-12-25 13:05:19
老师总结：pdo比mysqli的适应范更广些,但理论上执行效率,应该是低于mysqli的,但现在都是处理能力过剩,在便利和效率之间,得做一个权衡
