图像不从数据库 Codeigniter 4 中显示

image doesn't display from database Codeigniter 4

我是 codigniter 的新手。我正在尝试通过使用创建页面将它们发送到数据库来显示来自 mysql 数据库的图像,您可以在其中输入标题、一些信息和 select 图像,创建项目后显示的所有内容除外对于图像。一旦我打开 phpmyadmin,它就会显示图像有数据,但看起来它只是元数据,而不是实际图像本身。我已经坚持了几天了,所以我希望你们能帮助我!

在控制器中创建函数(已编辑):

    public function create(){
    $model = new ProjectModel();

    $file = $this->request->getFile('image');

    if ($this->request->getMethod() === 'post' && $this->validate([
            'title' => 'required|min_length[3]|max_length[255]',
            'info'  => 'required',
            'image' => 'uploaded[image]',
        ]))
    {
        $model->save([
            'title' => $this->request->getPost('title'),
            'slug'  => url_title($this->request->getPost('title'), '-', TRUE),
            'info'  => $this->request->getPost('info'),
            $tempfile = $file->getTempName(),
            $imgdata = file_get_contents($tempfile),
        ]);
        var_dump($imgdata);


        #echo view('project/success');
    }
    else
    {
        echo view('site/create');
    }
}

我的模型

namespace App\Models;

use CodeIgniter\Model;

class ProjectModel extends Model
{
protected $table = 'projects';

protected $allowedFields = ['title', 'slug', 'info', 'image'];

public function getProjects($slug = false)
{
    if ($slug === false)
    {
        return $this->findAll();
    }

    return $this->asArray()
            ->where(['slug' => $slug])
            ->first();
}
}

这是在您按下创建按钮后创建 div 元素的文件

<?php if (! empty($projects) && is_array($projects)) : ?>

<?php foreach ($projects as $project_item): ?>

    <div class="project-box" href="/projects/<?= esc($project_item['slug'], 'url') ?>">

        <?php echo '<img class="project-image" src="data:image/jpeg;base64,'.base64_encode($project_item['image']).'" alt="image" ">'?>

            <p class="project-name"><?=esc($project_item['title'])?></p>
            <div class="bottom-border">
                <p class="project-creator"><i class="far fa-user-circle"></i>&nbsp;<?=esc($project_item['creator'])?></p>
                    <div class="statistics">
                        <p class="project-likes"><i class="fas fa-heart"></i>&nbsp;<?=esc($project_item['likes'])?></p>
                        <p class="project-views"><i class="far fa-eye"></i>&nbsp;<?=esc($project_item['views'])?></p>
                    </div>
            </div>
    </div>
   <?php endforeach; ?> 
<?php else : ?>
   <h3>No Projects</h3>
<?php endif ?>

这是您可以在其中创建项目的创建文件

        <div class="parent">
           <?= \Config\Services::validation()->listErrors() ?>
            <form action="/site/create" method="post">
              <h1>Create Project</h1>
                <?= csrf_field() ?>
                <div class="form-group">
                    <input class="ph-title" type="input" name="title" placeholder="Title" /><br/>
                </div>
                <div class="grow-wrap">
                    <textarea class="ph-info" name="info" placeholder="Type in project info"></textarea>
                </div>

               <!-- <div class="file-input">
                    
                        <label for="file">
                            Select file
                            <p class="file-name"></p>
                        </label>
                </div> -->

                <input class="file-btn" type="file" name="image" value=""/><br/>
                <input class="create-btn" type="submit" name="submit" value="Create Project"/>
            </form>
    </div>

我做错了什么?

这里有一些错误。首先,您的表单设置为图片上传,但需要将 enctype 添加到表单标签,以便您的后端 PHP 可以接收 $_FILES 对象

<form action="/site/create" method="post" enctype="multipart/form-data">

从输入中删除 value=""...

 <input class="file-btn" type="file" name="image" />

现在您可以接收文件了 - 请参阅 https://codeigniter4.github.io/userguide/libraries/uploaded_files.html

您的验证应该更改

$this->validate([
    //... your other validations...
    'image' => 'uploaded[image]' // instead of required
]);

如果您想将图片存储在您的服务器上,然后将图片的名称记录在数据库中以供日后检索:

$imageDirectory="/path/to/where/you/store/images";
$imageName = $file->getRandomName(); 
$path = $this->request->getFile('image')->store($imageDirectory, $imageName);
// path is now the full path to the image on your server.

如果您想存储图像 BLOB 数据(如您的示例):

$tempfile = $file->getTempName();
$imgdata = file_get_contents($tempfile);

那么您的插入内容将如下所示...

$model->save([
            'title' => $this->request->getPost('title'),
            'slug'  => url_title($this->request->getPost('title'), '-', TRUE),
            'info'  => $this->request->getPost('info'),
            'image' => $imgdata,
        ]);