Question

我在Codeigniter中遇到照片上传系统问题。

我在我的控制器中注册时上传并调整照片大小，一旦完成，我会加载一个“上传成功”视图，我想再次显示照片。

问题是，

我步入一个实际上似乎没有失败的“失败”循环

和

我第一次加载视图时，照片未显示（虽然已上传，调整大小，路径位于我的数据库中）。但是，如果我刷新页面，它会正确显示。

这是控制器..检查靠近底部的注释，因为顶部基本上只是调整大小的逻辑和（虽然它现在有点难看）它确实有效

public function do_upload()
{
    $config['upload_path'] = './upload_pic/';
    $config['allowed_types'] = 'gif|jpg|png';
    $config['max_size'] = '100';
    $config['max_width']  = '1200';
    $config['max_height']  = '768';
    $_maxResizedWidth = '242';

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

    if ( $this->upload->do_upload() )
    {
        $this->data['upload_data'] = $this->upload->data();
        $this->data['title'] = "Upload Successful";

         switch($this->data['upload_data']['file_type']){
            case "image/jpg":
                $_file_suffix = ".jpg";
                break;
            case "image/jpeg":
                $_file_suffix = ".jpg";
                break;
            case "image/png":
                $_file_suffix = ".png";
                break;
            case "image/gif":
                $_file_suffix = ".gif";
                break;
            case "image/pjpeg":
                $_file_suffix = ".jpg";
                break;
         }

        $_fileName = $this->data['upload_data']['file_name']; 
        $_oldUploadPath = $config['upload_path'] . $_fileName;
        $_random_key = strtotime(date('Y-m-d H:i:s'));
        $_newUploadPath = $config['upload_path'] . 'resize_' . $_random_key . $_file_suffix;
        rename( $_oldUploadPath, $_newUploadPath );

        $_oldSize = getimagesize($_newUploadPath);
        $_oldWidth = $_oldSize[0];

        if($_oldWidth > $_maxResizedWidth){
            $_scale = $_maxResizedWidth/$_oldWidth;
            $_oldHeight = $_oldSize[1];
            $_imageType = image_type_to_mime_type($_oldSize[2]);
            $_newWidth = $_oldWidth * $_scale;
            $_newHeight = $_oldHeight * $_scale;
            $_resizedImage = imagecreatetruecolor($_newWidth, $_newHeight);
            switch($_imageType) {
                case "image/gif":
                    $_source=imagecreatefromgif($_newUploadPath); 
                    break;
                case "image/pjpeg":
                case "image/jpeg":
                case "image/jpg":
                    $_source=imagecreatefromjpeg($_newUploadPath); 
                    break;
                case "image/png":
                case "image/x-png":
                    $_source=imagecreatefrompng($_newUploadPath); 
                    break;
            }
            imagecopyresampled($_resizedImage, $_source, 0, 0, 0, 0, $_newWidth, $_newHeight, $_oldWidth, $_oldHeight);
            switch($_imageType) {
                case "image/gif":
                    imagegif($_resizedImage,$_newUploadPath); 
                    break;
                case "image/pjpeg":
                case "image/jpeg":
                case "image/jpg":
                    imagejpeg($_resizedImage,$_newUploadPath,90); 
                    break;
                case "image/png":
                case "image/x-png":
                    imagepng($_resizedImage,$_newUploadPath);  
                    break;
            }
        }

        $_newUploadPathWithoutDot = substr($_newUploadPath,1);

        $this->load->model('Member_model');
        $ID = $this->the_user->id;

             /// ****************************************************************************
             /// I step into this next if loop even though the upload_photo method does work.  
            /// In my view I get the "there was a problem" .. but the DB has been correctly updated

        if(!$this->Member_model->upload_photo( $ID, $_newUploadPathWithoutDot));
        {
            $uploadData = $this->upload->data();
            $this->data['message'] = "There was a problem entering your photo in the database ==";
        };

              /// And this is the view that's called
        $this->load->view('upload_big_success_view', $this->data);
    }
    else
    {
        $this->data['message'] = "there was a problem " . $this->upload->display_errors() . dirname(__FILE__);
        $this->data['title'] = "Upload Unsuccessful";
        $this->load->view('profile_photo_view', $this->data);
    }
}

（我知道那里有很多杂乱，我会给它一个重构）。

当视图首次加载时，几乎看起来图像是“未就绪”，即使一切都有效 - 上传，调整大小，文件路径都输入到数据库中......没有任何错误会引发任何错误到最后一个循环，它似乎认为“ - ＆gt; upload_photo（）”失败了。然后当我第一次打电话给我的视图时..

<img src"<?php echo $the_user->large_image_location; ?>" >

..不产生输出。但经过简单的刷新后，确实如此。虽然视图中仍然显示“有问题消息”。

顺便说一句 - 这是模特。没什么好看的。

public function upload_photo($ID, $_newUploadPath)
{
    $sql = "UPDATE users SET large_image_location=? WHERE id=?";
    $query = $this->db->query($sql, array($_newUploadPath, $ID));
    return $query;  
}

所有想法？

Answer 1

Codeigniter在加载视图时不会刷新页面，所以它永远不会加载图像，而是需要告诉Codeigniter使用redirect()函数刷新页面。您应该重定向到成功页面，而不是在do_upload()方法的末尾加载成功视图。

我会创建一个upload_big_success()方法，为您加载upload_big_success_view，然后重定向到该方法。

替换do_upload()中的以下行：

$this->load->view('upload_big_success_view', $this->data);

使用：

redirect(upload_big_success, 'location');

然后在同一个控制器中为您的成功页面创建一个方法。

public function upload_big_success() {
   // And this is the view that's called
   $this->load->view('upload_big_success_view');
}

在我刷新之前，Codeigniter中的上传和调整大小的照片在视图中不可用..我的视图加载“太快”了吗？

1 个答案: