PDO连接数据库

//连接及断开数据库

<?php
$myDb = [
    "type"=>"mysql",
    "host"=>"localhost",
    "dbname"=>"test",
    "user"=>"root",
    "pwd"=>"root",
    ];
$dsn = $myDb['type'].':host='.$myDb['host'].';dbname='.$myDb['dbname'];
try {
    $dbh = new PDO($dsn,$myDb['user'],$myDb['pwd']);
    echo "连接数据库成功";
} catch (PDOException $e){
    print $e->getMessage();
    die();
}
$dbh = null;//关闭数据库连接