PHP的PDO语句错误
问题描述：
我是php pdo的新手.在这里，我试图使用准备好的语句从数据库中获取数据库记录.但是它没有获取记录.我收到以下错误
I'm a newbie to php pdo. Here i'm trying to fetch my database records from database using prepared statements. But it didn't fetch the records. I'm getting this following error
致命错误:带有消息的未捕获异常'PDOException' 'SQLSTATE [3D000]:无效的目录名称:1046未选择数据库
Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[3D000]: Invalid catalog name: 1046 No database selected
为什么我会收到此错误?为什么不从数据库中获取记录?
why i'm getting this error? why it didn't fetch the records from database?
<?php
$user = "root";
$password = "password";
try {
$conn = new PDO('mysql:host=localhost;database=evouchers', $user, $password);
$conn -> setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch(PDOException $e){
echo 'DATABASE ERROR : ' . $e->getMessage();
}
$sql = "SELECT UserName FROM ebusers ORDER BY UserName";
$db = $conn->query($sql);
$db->setFetchMode(PDO::FETCH_ASSOC);
while($row = $db->fetch())
{
print_r($row);
}
?>
在数据库连接字符串中的
答
而不是数据库中使用dbname
in your db connection string instead of database use dbname
$conn = new PDO('mysql:host=localhost;database=evouchers', $user, $password);
---------------------------------------^
$conn = new PDO('mysql:host=localhost;dbname=evouchers', $user, $password);