Php 在codeigniter中上载文件时，显示网站当前无法处理此请求的原因。HTTP错误500

我有一个关于codeigniter的项目，它现在在localhost上运行得很好，当我在cpanel中上传一个文件到我的站点时，它显示example.com目前无法处理这个请求。HTTP错误500 为什么？谁能告诉我该怎么办

public function doupload($id,$action)
{

    $config['upload_path']          = 'SliderImages/';
    $config['allowed_types']        = 'gif|jpg|png|jpeg|psd|pdf|tiff';
    $config['overwrite']            = TRUE;
    $config['encrypt_name']         = false;
    $config['max_size']             = 10000000;
    $config['max_width']            = 999999;
    $config['max_height']           =99999;

    $this->upload->initialize($config);
    $files = $_FILES;

    if($action == "insert")
    {


            if($_FILES['slide_image']['name'] !== '')
            {

                    $_FILES['userfile']['name']= $files['slide_image']['name'];
                    $file_name = $_FILES['userfile']['name'];
                    $name =explode('.',$file_name);
                    $_FILES['userfile']['name'] = $id. '.' .$name[1];
                    $_FILES['userfile']['type']= $files['slide_image']['type'];
                    $_FILES['userfile']['tmp_name']= $files['slide_image']['tmp_name'];
                    $_FILES['userfile']['error']= $files['slide_image']['error'];
                    $_FILES['userfile']['size']= $files['slide_image']['size']; 

                    //$this->upload->do_upload();
                    if (!$this->upload->do_upload())
                    {                               
                        $error = array('error' => $this->upload->display_errors());         
                        return  $error; 
                        //print_r($error);die();
                    }
                    else
                    {
                        $msg = array('upload_data' => $this->upload->data());               
                        return $this->upload->data('file_name');

                    }

            }

    }


}

---

检查system/libraries/upload.php . . 查找“受保护的函数\u文件\u mime\u类型” . . 从更改代码

$finfo = @finfo_open(FILEINFO_MIME);
        if (is_resource($finfo)) // It is possible that a FALSE value is returned, if there is no magic MIME database file found on the system
        {
            $mime = @finfo_file($finfo, $file['tmp_name']);
            finfo_close($finfo);

            /* According to the comments section of the PHP manual page,
             * it is possible that this function returns an empty string
             * for some files (e.g. if they don't exist in the magic MIME database)
             */
            if (is_string($mime) && preg_match($regexp, $mime, $matches))
            {
                $this->file_type = $matches[1];
                return;
            }
        }

。 . 到 .

。 .

---

我解决了我的错误，希望这也能为你们工作，cmiiw

好吧，试着检查服务器日志，或者至少激活php显示错误来了解更多关于你们的问题的细节。请检查你们服务器的php版本是否和你们的代码兼容。。因为我们有最新版本7.0，如果设置为最新版本，那么尝试将其设置为5.6 PHP版本index.PHP和其他文件的权限是什么？可能是755？是的，还有文件和文件夹权限

if (function_exists('finfo_file'))
        {

            $finfo = @finfo_open(FILEINFO_MIME);            
            if (is_resource($finfo)) // It is possible that a FALSE value is returned, if there is no magic MIME database file found on the system
            {
                $mime = @finfo_file($finfo, $file['tmp_name']);
                finfo_close($finfo);

                /* According to the comments section of the PHP manual page,
                 * it is possible that this function returns an empty string
                 * for some files (e.g. if they don't exist in the magic MIME database)
                 */
                if (is_string($mime) && preg_match($regexp, $mime, $matches))
                {
                    $this->file_type = $matches[1];
                    return;
                }
            }
        }