Question

我正在使用以下脚本从表中检索第n条记录：

if($last_published_fb < $numposts){
    $last_published_fb--;
    // retrieve first post with id > last_published_fb
    $connect = dbconn(PROJHOST, POSTSDB, POSTSUSR, POSTSPWD);
    $sql = "SELECT * FROM tblposts ORDER BY id LIMIT :max,1";
    $query = $connect->prepare($sql);
    $query->bindParam(':max', $last_published_fb);
    if($query->execute()) {
        $rows = $query->fetchObject();
        $newid = ($rows ? $rows->id : null);
        echo 'to be published: ' . $newid;
    }
}

基本上，如果 $ last_published_fb 为0，我需要从表中检索第1行，如果是4，我需要第5行，依此类推。但是，上面的代码拒绝工作并在SQL语句中抛出语法错误。我错过了什么吗？这是错误消息：

PHP Fatal error:  Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''0',1' at line 1' in /xxxx/xxx/xxx/posts.php:39

Answer 1

尝试将$ last_published_fb转换为整数

 $query->bindParam(':max', (int) $last_published_fb, PDO::PARAM_INT);

使用PDO从表中检索第n条记录时出错

1 个答案: