abstract：<?php/** * PDO對(duì)象 * PDO（$dsn,$user,$password） * dsn: mysql:host = localhost/127.0.0.1;   dbname = userDB; chrset = utf8 (可忽略，默認(rèn)utf8) */$type = 'mysql';         //數(shù)據(jù)類

<?php
/**
* PDO對(duì)象
* PDO（$dsn,$user,$password）
* dsn: mysql:host = localhost/127.0.0.1;   dbname = userDB; chrset = utf8 (可忽略，默認(rèn)utf8)
*/

$type = 'mysql';         //數(shù)據(jù)類型

$host = '127.0.0.1';    //數(shù)據(jù)庫(kù)主機(jī)名

$dbname = 'test';     //數(shù)據(jù)庫(kù)名

$charset = 'utf8';      //默認(rèn)編碼

$port = '3306';         //可選；默認(rèn)值：3306

$dsn = $type.':host='.$host.';dbname='.$dbname.';charset='.$charset;


$user = 'root';         //數(shù)據(jù)庫(kù)用戶名

$password = 'root';     //數(shù)據(jù)庫(kù)密碼


try{
   //連接
   $pdo = new PDO($dsn,$user,$password);

   //關(guān)閉
   $pdo = NULL;

}catch (PDOException $e){
   exit($e->getMessage());
}

Correcting teacher：天蓬老師Correction time：2019-01-08 13:15:55
Teacher's summary：$pdo = NULL; 這個(gè)操作, 以后要放在應(yīng)用中, 記得上線時(shí),從連接文件中刪除,否則永遠(yuǎn)連不上