如何在 CodeIgniter 中上传图片?

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【中文标题】如何在 CodeIgniter 中上传图片?【英文标题】:How to upload image in CodeIgniter? 【发布时间】:2013-06-23 08:23:34 【问题描述】:

在视图中

 <?php echo form_open_multipart('welcome/do_upload');?>
 <input type="file" name="userfile" size="20" />

在控制器中

function do_upload()

    $config['upload_path'] = './uploads/';
    $config['allowed_types'] = 'gif|jpg|png';
    $config['max_size'] = '100';
    $config['max_width']  = '1024';
    $config['max_height']  = '768';
    $config['overwrite'] = TRUE;
    $config['encrypt_name'] = FALSE;
    $config['remove_spaces'] = TRUE;
    if ( ! is_dir($config['upload_path']) ) die("THE UPLOAD DIRECTORY DOES NOT EXIST");
    $this->load->library('upload', $config);
    if ( ! $this->upload->do_upload('userfile')) 
        echo 'error';
     else 

        return array('upload_data' => $this->upload->data());
    

我这样称呼这个函数

 $this->data['data'] = $this->do_upload();

并查看此图像:

<ul>
<?php foreach ($data['upload_data'] as $item => $value):?>
<li><?php echo $item;?>: <?php echo $value;?></li>
<?php endforeach; ?>
</ul>

我不知道是什么错误。

【问题讨论】:

在您的视图中写入&lt;?php var_dump($data['upload_data']); ?&gt; 并检查结果。附注:上传失败时不要在控制器中回显'error' 它给了我空值。我想问一个问题,上传文件夹放在哪里? 当您将./uploads/ 设置为上传文件夹时,它应该位于您的CodeIgniter 安装的根目录(靠近index.php)。 您的控制器似乎有问题,请发布更多信息。 我把这个文件夹放在 index.php 附近,但它仍然给我空输出。 【参考方案1】:

看来问题是您将表单请求发送到welcome/do_upload,并通过$this-&gt;do_upload() 在另一个中调用Welcome::do_upload() 方法。

因此,当您在第二种方法中调用$this-&gt;do_upload(); 时,$_FILES 数组将为

这就是为什么var_dump($data['upload_data']); 返回NULL

如果您想从welcome/second_method 上传文件,请将表单请求发送到您调用$this-&gt;do_upload();welcome/second_method

然后将表单辅助函数(在View内)更改如下1

// Change the 'second_method' to your method name
echo form_open_multipart('welcome/second_method');

使用 CodeIgniter 上传文件

CodeIgniter has documented the Uploading process 非常好,通过使用文件上传库。

您可以查看用户指南中的示例代码;此外,为了更好地了解上传配置,请查看手册页末尾的配置项说明部分。

还有几篇关于在 CodeIgniter 中上传文件的文章/示例,您可能需要考虑:

http://code.tutsplus.com/tutorials/how-to-upload-files-with-codeigniter-and-ajax--net-21684 http://runnable.com/UhIc93EfFJEMAADX/how-to-upload-file-in-codeigniter http://jamshidhashimi.com/image-upload-with-codeigniter-2/ http://code.tutsplus.com/tutorials/how-to-upload-files-with-codeigniter-and-ajax--net-21684 http://hashem.ir/CodeIgniter/libraries/file_uploading.html (CodeIgniter 3.0-dev 用户指南)

作为一个旁注:在使用 CodeIgniter 示例代码之前,请确保您已经加载了 urlform 辅助函数:

// Load the helper files within the Controller
$this->load->helper('form');
$this->load->helper('url');

// Load the helper files within the application/config/autoload
$autoload['helper'] = array('form', 'url');


1.表格必须是“多部分”类型的文件上传。因此,您应该使用返回的 `form_open_multipart()` 辅助函数: ``

【讨论】:

我在谷歌搜索另一个问题时偶然发现了这个问答。您可能需要使用以下链接 codeigniter.com/userguide3/libraries/… 更新您的答案,因为 ellislab.com/codeigniter/user-guide/libraries/… 库已过期。 @Fred-ii- 谢谢弗雷德。答案几乎是 3 岁 :) 我没有机会回到它。将使用 v3 ASAIC 更新答案。 我找到了关于这个cloudways.com/blog/codeigniter-upload-file-image的教程 上传文件的同时发送post变量可以吗?【参考方案2】:

codeigniter 中的简单图片上传

找到以下代码,方便上传图片

public function doupload()
     
        $upload_path="https://localhost/project/profile"  
        $uid='10'; //creare seperate folder for each user 
        $upPath=upload_path."/".$uid;
        if(!file_exists($upPath)) 
        
                   mkdir($upPath, 0777, true);
        
        $config = array(
        'upload_path' => $upPath,
        'allowed_types' => "gif|jpg|png|jpeg",
        'overwrite' => TRUE,
        'max_size' => "2048000", 
        'max_height' => "768",
        'max_width' => "1024"
        );
        $this->load->library('upload', $config);
        if(!$this->upload->do_upload('userpic'))
         
            $data['imageError'] =  $this->upload->display_errors();

        
        else
        
            $imageDetailArray = $this->upload->data();
            $image =  $imageDetailArray['file_name'];
        

     

希望这可以帮助您上传图片

【讨论】:

上传图片时提交的数据表单怎么样,可以@Hiren吗? 是的,这是可能的,您可以将数据与图像一起传递【参考方案3】:
//this is the code you have to use in you controller 

        $config['upload_path'] = './uploads/';  

// directory (http://localhost/codeigniter/index.php/your directory)

        $config['allowed_types'] = 'gif|jpg|png|jpeg';  
//Image type  

        $config['max_size'] = 0;    

 // I have chosen max size no limit 
        $new_name = time() . '-' . $_FILES["txt_file"]['name']; 

//Added time function in image name for no duplicate image 

        $config['file_name'] = $new_name;

//Stored the new name into $config['file_name']

        $this->load->library('upload', $config);

        if (!$this->upload->do_upload() && !empty($_FILES['txt_file']['name'])) 
            $error = array('error' => $this->upload->display_errors());
            $this->load->view('production/create_images', $error);
         else 
            $upload_data = $this->upload->data();   
        

【讨论】:

如何通过$error ti 视图而不出现任何错误? 是否可以在上传的同时发布数据?【参考方案4】:

像这样更改代码。它完美地工作:

public function uploadImageFile() //gallery insert
 
    if($_SERVER['REQUEST_METHOD'] == 'POST') 
    $new_image_name = time() . str_replace(str_split(' ()\\/,:*?"<>|'), '', 
    $_FILES['image_file']['name']);
    $config['upload_path'] = 'uploads/gallery/'; 
    $config['allowed_types'] = 'gif|jpg|png|bmp|jpeg';
    $config['file_name'] = $new_image_name;
    $config['max_size']  = '0';
    $config['max_width']  = '0';
    $config['max_height']  = '0';
    $config['$min_width'] = '0';
    $config['min_height'] = '0';
    $this->load->library('upload', $config);
    $upload = $this->upload->do_upload('image_file');
    $title=$this->input->post('title');
    $value=array('title'=>$title,'image_name'=>
    $new_image_name,'crop_name'=>$crop_image_name);

【讨论】:

这个调用是从多部分形式的 POST 条目中执行的吗?我只是想知道表单是否成功提交了整个数据以及图像......【参考方案5】:
$image_folder = APPPATH . "../images/owner_profile/" . $_POST ['mob_no'] [0] . $na;
            if (isset ( $_FILES ['image'] ) && $_FILES ['image'] ['error'] == 0) 
                list ( $a, $b ) = explode ( '.', $_FILES ['image'] ['name'] );
                $b = end ( explode ( '.', $_FILES ['image'] ['name'] ) );
                $up = move_uploaded_file ( $_FILES ['image'] ['tmp_name'], $image_folder . "." . $b );
                $path = ($_POST ['mob_no'] [0] . $na . "." . $b);

【讨论】:

见... 首先创建
然后为该表单添加多部分标签,这意味着您可以将图像上传到它。然后输入该图像标签的名称,即“图像”
然后在codeigniter控制器中,编写上面的代码 因此您的图像将保存在特定文件夹中,并且只有该图像的名称将存储在数据库表中【参考方案6】:

以下代码用于一次上传单个文件。 这对于上传单个文件是正确且完美的。 阅读所有注释说明并遵循代码。 毫无疑问,它奏效了。

public function upload_file() 
    ***// Upload folder location***
    $config['upload_path'] = './public/upload/';

    ***// Allowed file type***
    $config['allowed_types'] = 'jpg|jpeg|png|pdf';

    ***// Max size, i will set 2MB***
    $config['max_size'] = '2024';

    $config['max_width'] = '1024';
    $config['max_height'] = '768';

    ***// load upload library***            
    $this->load->library('upload', $config);

    ***// do_upload is the method, to send the particular image and file on that 
       // particular 
       // location that is detail in $config['upload_path']. 
       // In bracks will set name upload, here you need to set input name attribute 
       // value.***

    if($this->upload->do_upload('upload')) 
       $data = $this->upload->data();
       $post['upload'] = $data['file_name'];
     else 
      $error = array('error' => $this->upload->display_errors());
    
 

【讨论】:

【参考方案7】:

检查 $this->upload->initialize($config);这对我来说很好

    $new_image_name = "imgName".time() . str_replace(str_split(' ()\\/,:*?"<>|'), '', 
    $_FILES['userfile']['name']);
    $config = array();
    $config['upload_path'] = './uploads/'; 
    $config['allowed_types'] = 'gif|jpg|png|bmp|jpeg';
    $config['file_name'] = $new_image_name;
    $config['max_size']  = '0';
    $config['upload_path'] = './uploads/';
    $config['allowed_types'] = 'gif|jpg|png|mp4|jpeg';
    $config['file_name'] = url_title("imgsclogo");
    $config['max_size']      = '0';
    $config['overwrite']     = FALSE; 
    $this->upload->initialize($config);
    $this->upload->do_upload();
    $data = $this->upload->data();

【讨论】:

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