今天有人和我说pdo没办法show databases，实测可以

<?php

$host = "127.0.0.1";

$port = 3306;

$username = 'root';

$password = 'xxxx';

$dsn = "mysql:host={$host};port={$port};";

$dbconn = array(

'dns'=>$dsn,

'dbuser'=>$username,

'dbpwd'=>$password

);

$iokcount = 0;

try{

$db = new PDO($dbconn['dns'],$dbconn['dbuser'],$dbconn['dbpwd']);

$sql = "show databases";

$st = $db->query($sql);

$rs = $st->fetchAll();

//显示所有记录

foreach($rs as $rows)

{

print_r($rows);

}

$db = null;

}catch(PDOException $e)

{

echo $e->getMessage();

}



?>