問題描述

首先澄清一下，我知道有更好的方法可以做到這一點，但我決心進行實驗.

Just to first clarify, I know there are better ways to do this, but I'm determined to experiment.

基本上，我試圖從表單帖子中獲取圖像，然后將其發送到數據庫 MEDIUMBLOB 字段中.

Basically, I'm trying to grab an image from a form post, then send that into a database MEDIUMBLOB field.

不幸的是，使用我當前的方法，數據庫列中的最終結果始終為零字節.

Unfortunately, using my current method, the end result in the database column is always zero bytes. phpMyAdmin Screenshot

這里是表單上傳圖片的代碼:

Here is the code for the image upload on the form:

input type="file" name="_imagePost">

這是頁面上的 PHP 代碼，我使用的是 MySQLi :

Here is the PHP code on the page, I'm using MySQLi :

    if(isset($_POST['_imagePost']))
    {
        $_useImagePost = 1;
        $_imagePost = file_get_contents($_FILES['_imagePost']);

        // Open DB Connection
        $_conn = databaseConnect();

        $_stmt = $_conn->prepare("INSERT INTO Question (Question_Type, Question_Text, Question_Answer, Question_UseImage, Question_Image) VALUES (?, ?, ?, ?, ?)");
        $_stmt->bind_param("sssib", $_typePost, $_textPost, $_answerPost, $_useImagePost, $_null);
        $_stmt->send_long_data(4,$_imagePost);
        $_stmt->execute();

        // Close DB Connection
        $_conn->close();
    }

我不確定的是，當輸入類型為文件時，isset($_POST['_imagePost'])"是否有效.

What I am unsure of is if "isset($_POST['_imagePost'])" works when the input type is file.

然而，我可以肯定的是，當前的設置根本不起作用.

What I am sure of, however, is that the current setup doesn't work at all.

推薦答案

你寫的:

$_imagePost = file_get_contents($_FILES['_imagePost']);

正確的語法是:

$_imagePost = file_get_contents($_FILES['_imagePost']['tmp_name']);

$_FILES 是一個帶有以下鍵的關聯數組:

$_FILES is an associative array whit following keys:

• [name] => 原始文件名；
• [type] => 上傳文件的 mimetype;
• [tmp_name] => 臨時文件路徑(上傳文件的存儲位置)；
• [錯誤] => 錯誤；
• [size] => 上傳文件的大小.

• 查看更多關于$_FILES

這篇關于使用 Blob 將圖像上傳到 MySQL 數據庫的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！