我是Php的初学者，我被困在代码中，它显示一些错误：无效的目录名称。请帮助我克服 [英] I Am A Beginner In Php And I Stuck In The Code Where It Show Some Error : Invalid Catalog Name. Please Help Me To Overcome

问题描述

<?PHP
$config['db']=array(
                    'host'      =>'localhost',
                    'username'  =>'root',
                    'password'  => '',
                    'dbname'    =>'testing'
                    );
$db= new PDO(
                'mysql:host =   '.$config['db']['host'].';
                 dbname     :   '.$config['db']['dbname'],
                                  $config['db']['username'],
                                  $config['db']['password']
            );
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$query = "SELECT * from Studentsdetails ";
$Data = $db->prepare($query);
try
    {
    $Data->execute();
    $Show=$Data->fetchALL(PDO::FETCH_ASSOC);
    echo '<pre>',print_r($Show),'</pre>';
    }
catch(PDOException $e)
    {
    $e->getMessage();
    //die($e->getMessage());
    echo '<pre>',print_r($e),'</pre>';
    die('Arrrgh!');
    }

?>

推荐答案

config [' db'] = array（
' host' => ' localhost'，
' username' => < span class =code-string>' root'，
' password' => ' '，
' dbname' => ' testing'
）;

config['db']=array( 'host' =>'localhost', 'username' =>'root', 'password' => '', 'dbname' =>'testing' );

db = new PDO（
' mysql ：host ='。

db= new PDO( 'mysql:host = '.

config [' db'] [' host']。' ;
dbname：'。

config['db']['host'].'; dbname : '.

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