PDO INSERT查询500服务器错误

Question

我是新手使用PDO,我在提交表单时收到http 500服务器错误.

带有处理代码的php页面在正确的文件夹中,所以我不知道它为什么会抛出500错误.

没有任何网址重写.

这是我的代码:

        try {
        $dbh = new PDO("mysql:host=$hostname;dbname=crm",$username,$password);

        $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // <== add this line

        $stmt = $db->prepare("INSERT INTO testdrives (forename, surname,phone,email,add1,add2,add3,city,county,postcode,car,date) VALUES (:forename, :surname,:phone,:email,:add1,:add2,:add3,:city,:county,:postcode,:car,:date)");
                $stmt->bindParam(':forename', $_POST['forename']);
                $stmt->bindParam(':surname', $_POST['surname']);
                $stmt->bindParam(':phone', $_POST['phone']);
                $stmt->bindParam(':email', $_POST['email']);
                $stmt->bindParam(':add1', $_POST['add1']);
                $stmt->bindParam(':add2', $_POST['add2']);
                $stmt->bindParam(':add3', $_POST['add3']);
                $stmt->bindParam(':city', $_POST['city']);
                $stmt->bindParam(':county', $_POST['county']);
                $stmt->bindParam(':postcode', $_POST['postcode']);
                $stmt->bindParam(':car', $_POST['car']);
                $stmt->bindParam(':date', $_POST['date']);
                $stmt->execute();
        if ($dbh->query($sql)) {
        echo "<script type= 'text/javascript'>alert('New Record Inserted Successfully');</script>";
        }
        else{
        echo "<script type= 'text/javascript'>alert('Data not successfully Inserted.');</script>";
        }

        $dbh = null;
        }
        catch(PDOException $e)
        {
        echo $e->getMessage();
        }

Answer 1

编辑:

我错过了用于连接的错误变量$dbh和$db准备中; 我的错.

原始答案.

这一行:

if ($dbh->query($sql)) {...}

失败有两个原因:

• 呼吁query()已经准备/执行的内容.
• 使用不存在的变量,$sql.

用相关的括号去除该语句,并简单地替换它并替换为$stmt->execute();:

if($stmt->execute()){

        // success

    } else{

        // error

    }

并使用PDO的错误处理(正如您现在所做)和PHP的错误报告:

• http://php.net/manual/en/pdo.error-handling.php
• http://php.net/manual/en/function.error-reporting.php

还检查您的日志.