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我正在尝试使用 jQueryUI 选项卡和菜单小部件制作目录列表。我有以下用于获取目录的代码。

<?php 

     $db = new PDO('mysql:host='.$host.';dbname='.$databaseName, 
                    $user, 
                    $password,
                    array(
                        PDO::ATTR_EMULATE_PREPARES => false,
                        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
                  )
               );

    $menu = '';
    $charTabs = '<div id="charTabs">'; //1
    $db->exec('set names utf8');
    $queryFirstLetters = $db->prepare('SELECT DISTINCT LEFT(organization, 1) as org FROM Organizations WHERE parent_id = 0 ORDER BY organization', array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));

    //Add each first characters to the charTabs
    $queryFirstLetters->execute();
    $charTabs .='<ul>'; //2
    while($rowFL = $queryFirstLetters->fetch(PDO::FETCH_ASSOC)) 
    { 
        $charTabs .= '<li><a href="#' . $rowFL['org'] . '">' . $rowFL['b'] . '</a></li>';//3
    }   
    $charTabs .= '</ul>'; //4

    //Create Divs corresponding to list items for each first letter.
    $queryFirstLetters->execute();
    while($rowFL = $queryFirstLetters->fetch(PDO::FETCH_ASSOC))
    { 
        $charTabs .= '<div id="' . $rowFL['org'] . '">'; //5

        //Get the parent organizations and add their children as sub menu items
        $queryParentOrganizations = $db->prepare('SELECT * FROM Organizations WHERE parent_id = 0 AND LEFT(organization,1) = :p1 ORDER BY organization', array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));
        $queryParentOrganizations->bindValue(':p1', $rowFL['org'], PDO::PARAM_STR);
        //This is the line 26 which crashes
        $queryParentOrganizations->execute(); 
        //This is the line 26 which crashes
        echo '<script>$(function(){ $("#menu'.$rowFL['org'].'").menu(); });</script>';
        $menu = '<ul id="menu'.$rowFL['org'].'">';
        while($rowPO = $queryParentOrganizations->fetch(PDO::FETCH_ASSOC))
        {
            $queryChildOrganizations = $db->prepare('SELECT * FROM Organizations WHERE parent_id = :p1 ORDER BY organization', array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));
            $queryChildOrganizations->bindValue(':p1', $rowPO['id'], PDO::PARAM_INT);
            $queryChildOrganizations->execute();

            $menu .= '<li><a class="list" href="#">'.$rowPO['organization'].'</a>';
            if ($queryChildOrganizations->rowCount() > 0 )
            {
                $menu .= '<ul>';
                while($rowCO = $queryChildOrganizations->fetch(PDO::FETCH_ASSOC))
                {
                    $menu .= '<li><a class="list" href="#' . $rowCO['id'] . '">' . $rowCO['organization'] . '</a></li>';
                }
                $menu .= '</ul>';
            }
            else
            {
                $menu .= '</li>';
            }
        }
        $menu .= '</ul>';
        $charTabs .= $menu . '</div>';
    }
    $charTabs .= '</div>';

    echo $charTabs;
?>

忽略性能问题，它工作正常。但是在上传到服务器后，我得到了以下与 PDO 相关的错误。

PHP 致命错误：未捕获的异常 'PDOException' 带有消息 'SQLSTATE[HY000]：一般错误：2014 在其他无缓冲查询处于活动状态时无法执行查询。考虑使用 PDOStatement::fetchAll()。或者，如果您的代码只针对 mysql 运行，您可以通过设置 PDO::MYSQL_ATTR_USE_BUFFERED_QUERY 属性来启用查询缓冲。在 /home/server/public_html/directory/index.php:26

堆栈跟踪：

#0 /home/server/public_html/directory/index.php(26): PDO->prepare('SELECT * FROM O...')

#1 /home/server/public_html/directory/index.php(26): include('/home/server/publ...')

#2 {main} 在第 26 行的 /home/server/public_html/directory/index.php 中抛出

4

1 回答 1

0

在其他无缓冲查询处于活动状态时无法执行查询。考虑使用PDOStatement::fetchAll(). 或者，如果您的代码只针对 mysql 运行，您可以通过设置PDO::MYSQL_ATTR_USE_BUFFERED_QUERY属性来启用查询缓冲。

于 2013-06-20T11:25:28.540 回答