將文件上傳到數據庫PHP / WordPress

Question

我已經創建了此PHP代碼以將文件上傳到我的數據庫（phpMyAdmin）中，但是我不知道如何在WordPress上使其工作。

$con = mysqli_connect("localhost","root","","mydb");
if (mysqli_connect_errno()) {
    echo "Unable to connect to MySQL! ". mysqli_connect_error();
}
if (isset($_POST['submit'])) {
    $target_dir = get_template_directory_uri() .'/Uploaded_Files';
    $target_file = $target_dir . date("dmYhis") . basename($_FILES["file"]["name"]);
    $uploadOk = 1;
    $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

    if($imageFileType != "jpg" || $imageFileType != "png" || $imageFileType != "jpeg" || $imageFileType != "gif") {
        if (move_uploaded_file($_FILES["file"]["tmp_name"], $target_file)) {
            $files = date("dmYhis") . basename($_FILES["file"]["name"]);
        } else {
            echo "Error Uploading File";
            exit;
        }
    } else {
        echo "File Not Supported";
        exit;
    }
    $filename = $_POST['filename'];
    $location = get_template_directory_uri() .'/Uploaded_Files . $files';
    $getuser = $_SESSION['id'];
    $settime = date("Y-m-d H:i:s");
    $setmsg = $con->real_escape_string($_POST['msg']); 
    // Database Query goes here.
}

Answer 1

通常，當我們從WordPress站點中導出數據庫時，它會顯示這樣的代碼，並在其中提供有關Wordpress插件頁面等的表格信息。

-- Table structure for table `wp_commentmeta`
--

CREATE TABLE IF NOT EXISTS `wp_commentmeta` (
  `meta_id` bigint(20) unsigned NOT NULL,
  `comment_id` bigint(20) unsigned NOT NULL DEFAULT '0',
  `meta_key` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `meta_value` longtext COLLATE utf8mb4_unicode_ci
) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


AT the head of exported sql sheet it shows... 

-- phpMyAdmin SQL Dump
-- version 4.3.8
-- http://www.phpmyadmin.net
--
-- Host: localhost
-- Generation Time: Oct 10, 2017 at 11:57 AM
-- Server version: 5.5.51-38.2
-- PHP Version: 5.6.20

SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET time_zone = "+00:00";


/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;

--
-- Database: database name

Answer 2

首先，當使用WordPress數據庫時，請勿使用mysqli_connect連接，因為WordPress具有自己的API與MySQL交互，請使用官方文檔： https : mysqli_connect 。

您說過“在WordPress數據庫中上傳文件”，我想您的意思是將其添加到Media Gallery的方法，在這種情況下，本教程應有助於https://rudrastyh.com/wordpress/how-to-add-images-to -media-library-from-uploaded-files-programmatically.html