Question

我有一个页面，用户可以更新或更改他的个人资料信息，例如他的位置或他的个人资料图片。默认情况下，每个用户在其配置文件页面上获取占位符数据或信息，并且mysql数据库中的那些字段为空或具有该用户ID的行不存在。所以首先我要检查用户以前是否将他的个人资料信息输入到数据库中，如果数据存在，我将只使用非空的输入字段更新它，这部分有效。但是，如果数据不存在于数据库或行中且该用户ID不存在，那么我想要插入数据，但仅限于非空的输入。

但这是我得到的错误

未捕获的异常＆＃39; PDOException＆＃39; with message＆＃39; SQLSTATE [42000]：语法错误或访问冲突：1064您的SQL语法中有错误; ...

这是我的代码（$userID是会话$userID = $_SESSION['ID'];）

if(isset($_POST['updateInfo'])) {
$userDesc = filter_var($_POST['description_update'], FILTER_SANITIZE_STRING);
$userLocation = filter_var($_POST['location_update'], FILTER_SANITIZE_STRING);
$userBirthDate = filter_var($_POST['birthDate_update'], FILTER_SANITIZE_STRING);
$user_picture_tmp = $_FILES['user_picture']['tmp_name'];
$user_picture_name = $_FILES['user_picture']['name'];


$checkInfo = $con->prepare("SELECT * FROM user_info WHERE userid=:userID");
$checkInfo->execute(array(':userID' => $userID));
$data = $checkInfo->fetch(PDO::FETCH_ASSOC);    
$count_rows = $checkInfo->rowCount();

//Here i am checking if data exists in mysql and UPDATING it    
if($count_rows > 0) {   

    if(!empty($userDesc)) {
        $query = $con->prepare("UPDATE user_info SET description=:description WHERE userid=:userID");
        $query->execute(array(':userID' => $userID, ':description'=> $userDesc));
    }   
    if(!empty($userLocation)) {
        $query = $con->prepare("UPDATE user_info SET location=:location WHERE userid=:userID");
        $query->execute(array(':userID' => $userID, ':location'=> $userLocation));
    }
    if(!empty($userBirthDate)) {
        $query = $con->prepare("UPDATE user_info SET birthDate=:birthDate WHERE userid=:userID");
        $query->execute(array(':userID' => $userID, ':birthDate'=> $userBirthDate));
    }
    if(!empty($user_picture_name)) {
        $query = $con->prepare("UPDATE user_info SET profile_pic=:profile_pic WHERE userid=:userID");
        move_uploaded_file($user_picture_tmp, 'user_pic/'.$user_picture_name);
        $query->execute(array(':userID' => $userID, ':profile_pic'=> $user_picture_name));

    }   
    //But if data doesn't exists i want to INSERT IT and here is error
}   else {

    if($userDesc AND $userLocation AND $userBirthDate AND $user_picture_name != '') {

        $query = $con->prepare("INSERT INTO user_info(userid) VALUES(:userID)");
        $query->execute(array(':userID' => $userID));

        if(!empty($userDesc)) {
            $query = $con->prepare("INSERT INTO user_info(description) VALUES(?) WHERE userid=?");
            $query->execute(array($userDesc, $userID));
        }   
        if(!empty($userLocation)) {
            $query = $con->prepare("INSERT INTO user_info(location) VALUES(?) WHERE userid=?");
            $query->execute(array($userLocation, $userID));
        }
        if(!empty($userBirthDate)) {
            $query = $con->prepare("INSERT INTO user_info(birthDate) VALUES(?) WHERE userid=?");
            $query->execute(array($userBirthDate, $userID));
        }   
        if(!empty($user_picture_name)) {
            $query = $con->prepare("INSERT INTO user_info(profile_pic) VALUES(?) WHERE userid=?");
            move_uploaded_file($user_picture_tmp, 'user_pic/'.$user_picture_name);
            $query->execute(array($user_picture_name, $userID));

        }
    } else {echo 'All fields are empty';} 

}                       
}

所以我的问题是为什么我得到这个错误，我也是这样做的错误方法还是有其他更好的方法来做到这一点。这仅用于学习目的。

Answer 1

你在那里做了很多插页！你应该只做一次插入！

尝试使用以下内容替换您的else语句：

else {
    if($userDesc AND $userLocation AND $userBirthDate AND $user_picture_name != '') {

        if($userDesc = ''){$userDesc = 'Placeholder description';}
        if($userLocation = ''){$userLocation = 'Placeholder location';}
        if($userBirthDate = ''){$userBirthDate = 'Placeholder birthdate';}
        if($user_picture_name = ''){$user_picture_name = 'Placeholder picture_name';}

        if ($stmt = $con->prepare("INSERT INTO user_info(description, location, birthDate, profile_pic ) VALUES(?,?,?,?)")) {
            $stmt->bind_param("ssss", $userDesc, $userLocation,$userBirthDate, $user_picture_name );
            $stmt->execute();
        }
    } else {echo 'All fields are empty';} 
}

将数据从PHP非空的输入插入MySQL数据库

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