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function rowCount() on a non-object我在两个不同的页面上不断收到错误消息。知道为什么会发生这种情况以及如何更改代码以防止它发生吗？

错误 - 如下 

Fatal error: Call to a member function rowCount() on a non-object in /opt/lampp/htdocs/xampp/index.php on line 35

编码：

$sql = "SELECT * from idea ORDER BY datetime DESC LIMIT 50;";
$result = $pdo->query($sql);

if($result->rowCount() > 0 && !empty($result)) // line 35
{
    foreach ($result as $row) 
    {
    $id = $row['id'];
    $title = $row['title'];
    $idea = $row['idea'];

    echo '<span class="idea" id="'.$id.'"><strong style="color: #0081C5">' . $title . "</strong>&nbsp;-&nbsp;" . $idea . '&nbsp;<a class="delete" href="#">[Delete]</a></span>';
    }
}

错误 - 如下

Fatal error: Call to a member function rowCount() on a non-object in /opt/lampp/htdocs/xampp/assets/update.php on line 6

编码

 $sql = "SELECT * from idea ORDER BY datetime DESC LIMIT 50;";
$result = $pdo->query($sql);

if($result->rowCount() > 0 && !empty($result)) // line 6
    {
        foreach ($result as $row) 
        {
        $id = $row['id'];
        $title = $row['title'];
        $idea = $row['idea'];

        echo '<span class="idea" id="'.$id.'"><strong style="color: #0081C5">' . $title . "</strong>&nbsp;-&nbsp;" . $idea . '&nbsp;<a class="delete" href="#">[Delete]</a></span>';
        }
    }
4

1 回答 1

3

改成这个

if(!empty($result) AND $result->rowCount() > 0)

于 2013-08-01T22:01:47.423 回答