摘要：<?php const DSN = "mysql:host=127.0.0.1:3306;dbname=mydb"; const USER_NAME = "root"; const PASSWORD =
<?php
const DSN = "mysql:host=127.0.0.1:3306;dbname=mydb";
const USER_NAME = "root";
const PASSWORD = "";
try{
$conn = new PDO(DSN,USER_NAME,PASSWORD);
echo "连接成功";
}catch (PDOException $e){
echo $e->getMessage();
}finally{
$conn = null;
echo "关闭数据库连接";
}
?>
批改老师：西门大官人批改时间：2019-03-29 09:36:51
老师总结：作业写的不错，变量和常量命名很规范，见名知意。
