PHP PDO驱动程序

Question

I just start learning about PDO, I need some help, I Installed PHPStorm, and I just start using it too, I already have a datbase on phpMyAdmin, I made this code, but it gives me an error

    <?php
try {
    $handler = new PDO ('mysql:localost;dbname=Database', 'root', 'password');
    $handler -> setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOExeption $e)
{
    die('Sorry, Database problem');
}
$query = $handler->query('select * from users');
while($r= $query->fetch())
{
    echo $r['name'];
}
?>

here is the error:

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[3D000]: Invalid catalog name: 1046 No database selected' in C:\\Users\\user1\\PhpstormProjects\\PDO\\pdo.php:11 Stack trace: #0 C:\\Users\\user1\\PhpstormProjects\\PDO\\pdo.php(11): PDO->query('select * from u...') #1 {main} thrown in C:\\Users\\user1\\PhpstormProjects\\PDO\\pdo.php on line 11. Any help?

thanks in advance :).

Answer 1

Please make sure your database actually exists and that there are no spelling mistakes in your connection code.

Edit 1

I also noticed this issue with your connection I'm not sure if this is what is causing it but you need mysql:host= not just mysql:localhost . Also you have a spelling mistake localost .

Change this,

$handler = new PDO ('mysql:localost;dbname=Database', 'root', 'password');

To,

$handler = new PDO('mysql:host=localhost;dbname=myDb', $username, $password);

Answer 2

replace the handler declaration for this:

$handler = new PDO('mysql:host=localhost;dbname=myDatabase', $username, $password);

where myDatabase is the one you will be using as default..