javascript - PHP未定义索引(jquery文件上传导致)

Question

我一直在尝试为我正在开发的网站提供文件上传功能。我在表单之外执行此操作，经过几天的搜索，我终于从 this question: 的答案中找到了适合我的方法的东西。

问题是，当我将代码应用到自己的脚本中时，我收到“未定义索引”错误，当我删除它时，一切正常。

这是我的代码:

HTML

<div class='error-msg'></div>
<input type='text' id='newsitem-message' />
<input type='file' id='newsitem-thumbnail' />
<div class='submit' onclick='newsItem(\"insert\");'>Post news</div>

jQuery

function newsItem(action){
    var thumbnail = $('#newsitem-thumbnail')[0].files[0];
    var fileReader = new FileReader();
    fileReader.readAsText(thumbnail, 'UTF-8');
    fileReader.onload = shipOff;

    function shipOff(e){
        var r = e.target.result;
        if(action == "insert"){
            $.post("requestPages/newsitems.php", {message:$("#newsitem-message").val(),
                                              thumbnail:thumbnail.name,
                                              action:action,
                                              data:r},
            function(result){
                console.log(result);
                console.log(r); //This freezes my console/inspector window, forcing me to restart the browser-tab
                if(result == "succes"){
                    window.location.reload();
                }else{
                    $(".error-msg").html(result);
                }
            });
        }else if(action == "delete"){
            //To be implemented when I get the submit working D:
        }
    }
}

PHP(请原谅困惑 - 需要认真清理)

<?php
    include("../assets/libs/SQLLib.php");
    DB_Connect("test");

    echo print_r($_POST);
    echo var_dump($_POST);
    $message = $_POST['message'];
    $action = $_POST['action'];
    $thumbnail = $_POST['thumbnail'];
    $data = $_POST['data'];

    $serverFile = time().$thumbnail;
    $fp = fopen('../assets/images/thumbnails/'.$serverFile, 'w');
    fwrite($fp, $data);
    fclose($fp);
    $returnData = array("serverFile" => $serverFile);
    echo json_encode($returnData);

    if($_POST['message'] != ""){
        $canPost = true;
    }else{
        echo "The message can not be empty.";
    }

    if($action == "insert" && $canPost){
        $sql = "insert into newsitems
                (date, message, thumbnail)
                values
                (NOW(),'".$message."', '".$thumbnail."')";
        $result = mysql_query($sql);
        if(!$result){
            echo "Uh-oh! Something went wrong while posting the news! ".mysql_error();
        }else{
            echo "succes";
        }
    }else if($action == "delete"){
        $sql = "";
    }
?>

有人看出这里出了什么问题吗？或者有人有其他选择吗？

希望有人能帮我解决这个问题。

Answer 1

像这样改变它:

include("../assets/libs/SQLLib.php");
DB_Connect("test");

print_r($_POST); //Dont echo, what is already echoed
var_dump($_POST); //Dont echo, what is already echoed
$message = !empty($_POST['message'])?$_POST['message']:'';
$action = !empty($_POST['action'])?$_POST['action']:'';
$thumbnail = !empty($_POST['thumbnail'])?$_POST['thumbnail']:'';
$data = !empty($_POST['data'])?$_POST['data']:'';
if(!empty($thumbnail) && !empty($data)){

$serverFile = time().$thumbnail;
    $fp = fopen('../assets/images/thumbnails/'.$serverFile, 'w');
    fwrite($fp, $data);
    fclose($fp);
    $returnData = array("serverFile" => $serverFile);
    echo json_encode($returnData);
} else {
echo json_encode(array('error'=>'No data and thumbnail assigned'));
}

if($message != ""){
    $canPost = true;
}else{
    echo "The message can not be empty.";
}

if($action == "insert" && $canPost){
    $sql = "insert into newsitems
            (date, message, thumbnail)
            values
            (NOW(),'".$message."', '".$thumbnail."')";
    $result = mysql_query($sql);
    if(!$result){
        echo "Uh-oh! Something went wrong while posting the news! ".mysql_error();
    }else{
        echo "success";
    }
}else if($action == "delete"){
    $sql = "";
}

您只需更改 .htaccess 或 php 中的错误报告级别即可防止显示警告消息。在 .htaccess 中:

php_flag error_reporting E_ERROR

如果在 .php 文件中，则

<?php error_reporting(E_RROR); //This displays only Errors, no warning and notices.