Question

我收到了这个错误，这让我摸不着头脑：

致命错误：未捕获的异常'PDOException'，消息'无效数据源名称'in /Users/aaronwilson/Desktop/testing_server/ATOM_CMS/functions/sandbox.php:10 堆栈跟踪：＃0 /Users/aaronwilson/Desktop/testing_server/ATOM_CMS/functions/sandbox.php(10）： PDO-＆gt; __ construct（'SELECT title FR ...'）＃1 /Users/aaronwilson/Desktop/testing_server/ATOM_CMS/config/setup.php(30）： get_title（NULL，'blog'）＃2 /Users/aaronwilson/Desktop/testing_server/ATOM_CMS/index.php(2）： include（'/ Users / aaronwil ...'）＃3 {main}引入 /Users/aaronwilson/Desktop/testing_server/ATOM_CMS/functions/sandbox.php 在第10行

这是sandbox.php代码：

<?php ## Sandbox PHP/PDO Functions 
function get_page($dbc, $pg) {
$sql = new PDO("SELECT * FROM pages WHERE page = '$pg' AND status = 1 LIMIT 1");
$stmt = $dbc->prepare($sql);
$stmt->execute();
$row = $stmt->fetch();
echo '<h1>'.$page['title'].'</h1>';
echo '<div class="content">'.$page['body'].'</div>';}
function get_title($dbc, $pg)  
$sql = new PDO("SELECT title FROM pages WHERE page = '$pg' AND status = 1   LIMIT 1");
$stmt = $dbc->prepare($sql);
$stmt->execute();
$row = $stmt->fetch();
return $page['title'];}
?>

在Setup.php上有一个S_GET函数来拉取url来调用sandbox.php上的函数：

if ($_GET ['page'] == '') {
$pg = 'home';} 
else {
$pg = $_GET ['page']; }

Answer 1

new PDO("SELECT * FROM pages WHERE page = '$pg' AND status = 1 LIMIT 1");

这不是你如何创建一个PDO对象，它的参数是不同的，它不接受查询。以下是构造函数原型。

public PDO :: __ construct（）（string $ dsn [，string $ username [，string $ password [，array $ driver_options]]]）

相应地发送参数。发送dsn，username，password。

来自php.net的示例

<?php
/* Connect to an ODBC database using driver invocation */
$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';

try {
    $dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
}

?>

<强> Source

Answer 2

您没有正确使用PDO库，这就是导致错误的原因。以下是许多正确方法中的一个示例:(根据您的情况调整并确保它对您有所帮助）

$variable1 = "somthing";
$variable2 = "somewhat";
try
  {
    require_once("db-info.php");
    $pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
    $db = new PDO('mysql:host='.$host.';dbname=' . $dbname, $dbuser, $dbpassword,     $pdo_options);
    $response = $db->prepare('SELECT column1, column2 FROM table WHERE column1 = :value1 and column2 = :value2');

    $response->execute(array('value1' => $variable1,
                             'value2' => $variable2
                            ));
    $data = $response->fetch(); // works for one set of data 
    // if your are trying to fetch multiple line use a (while $data = $response->fetch())
    //and insert your code inside the while loop.

    //insert your code here....
    //.........................
    //.............
    //using a return true or false may help you with your function case
    $response->closeCursor();
}
catch (Exception $error)

   {

 die('error while selecting data' . $error->getMessage());

   }

PDO致命错误更新

2 个答案: