如何在CodeIgniter中上传图像？

Question

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());
    }
}

我将此功能称为

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

并查看此图片：

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

我不知道错误是什么。

Answer 1

问题似乎是您将表单请求发送到welcome/do_upload，然后通过Welcome::do_upload()在另一个方法中调用$this->do_upload()方法。

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

这就是var_dump($data['upload_data']);返回NULL的原因。

如果您要从welcome/second_method上传文件，请将表单请求发送到您致电$this->do_upload();的 welcome / second_method 。

然后更改表单助手函数（在 View 中），如下所示 ¹ ：

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

---

使用CodeIgniter上传文件

通过使用文件上传库，

CodeIgniter has documented the Uploading process 非常好。

您可以查看用户指南中的示例代码;此外，为了更好地理解上传配置，请查看手册页末尾的配置项解释部分。

还有一些关于在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）

正如旁注：在使用CodeIgniter示例代码之前，请确保已加载url和form辅助函数：

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

---

<子> 1.表单必须是“multipart”类型才能进行文件上传。因此，您应该使用form_open_multipart()辅助函数返回：
<form method="post" action="controller/method" enctype="multipart/form-data" />

Answer 2

在codeigniter中上传简单图片

查找以下代码以便轻松上传图片

 

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

click to know more

Answer 3

像这样更改代码。它完美地运作：

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);}

Answer 4

文件上传是许多网络应用中必不可少的过程。几乎每个网站和Web应用都需要集成的文件上传组件。 CodeIgniter支持的应用程序中的文件和图像上传是一个简单的组件，可以解决上传过程中的问题。

创建控制器

下一步是在控制器文件夹中创建文件。将文件命名为upload_controller.php。在此文件中，我将通过以下代码加载用于初始化Upload类的库：

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

我还将通过控制器函数do_upload()设置文件上载过程的首选项。此函数将包含以下代码：

$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';

有关详细信息，请查看 https://www.cloudways.com/blog/codeigniter-upload-file-image/

Answer 5

//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();   
        }

Answer 6

$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);

Answer 7

下面的代码用于一次上传单个文件。 上传单个文件是正确且完美的。 阅读所有注释的说明，并遵循代码。 绝对可以。

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());
    }
 }