如何将CodeIgniter中PDF上传大小从2MB提升至5MB以上

Got it, let's fix that 2MB upload limit for your PDF files in CodeIgniter. There are two key parts you need to adjust: the CodeIgniter upload configuration AND your PHP server settings (since PHP has its own default limits that can override framework settings). Here's how to do it step by step:

Step 1: Update CodeIgniter's Upload Configuration #

Add a max_size parameter to your upload config array. This sets the maximum file size the framework will accept, measured in kilobytes (5MB = 5120KB). If you need even larger files, just increase this number (e.g., 10240 for 10MB).

Step 2: Adjust PHP Server Limits #

PHP has global upload limits that will block files even if CodeIgniter allows them. You'll need to modify these in your php.ini file (or use .htaccess/user.ini if you don't have server access):

• Set upload_max_filesize = 5M (or higher)
• Set post_max_size = 6M (this should always be larger than upload_max_filesize to account for other form data)
  Restart your web server (Apache/Nginx) after making these changes. If using .htaccess, add these lines instead:

php_value upload_max_filesize 5M
php_value post_max_size 6M

Modified Full Code #

I also cleaned up a couple of syntax issues in your original code (like extra space in a database key and messy else blocks) and added error handling for upload failures:

public function question_upload() {
    $this->form_validation->set_rules('examname', 'Select Exam Type', 'required');
    $this->form_validation->set_rules('assignment', 'Subject Name', 'required');
    $this->form_validation->set_rules('question', 'Content Name', 'required');
    $this->form_validation->set_rules('subcontent', 'Sub Content Name', 'required');

    if (empty($_FILES['picture']['name'])) {
        $this->form_validation->set_rules('picture', 'Pdf', 'required');
    }

    if ($this->form_validation->run() == FALSE) {
        $data['h'] = $this->Faculty_Model->faculty_QuestionDisplay();
        $data['studentAnswer'] = $this->Faculty_Model->student_Question();
        $this->load->view('index1', $data);
    } else {
        $picture = '';
        if (!empty($_FILES['picture']['name'])) {
            $config['upload_path'] = 'uploads/files/';
            $config['allowed_types'] = 'jpg|jpeg|png|gif|pdf';
            $config['file_name'] = $_FILES['picture']['name'];
            // Set max file size to 5MB (5120 KB)
            $config['max_size'] = 5120;

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

            if ($this->upload->do_upload('picture')) {
                $uploadData = $this->upload->data();
                $picture = $uploadData['file_name'];
            } else {
                // Show upload error to the user
                $this->session->set_flashdata('error_msg', $this->upload->display_errors());
                redirect('welcome/index1');
            }
        }

        $userData = array(
            'datee' => $this->input->post('datee'),
            'examname' => $this->input->post('examname'),
            'assignment_name' => $this->input->post('assignment'),
            'question' => $this->input->post('question'), // Fixed extra space in key name
            'subcontent' => $this->input->post('subcontent'),
            'pdffile' => $picture
        );

        $this->Faculty_Model->faculty_Questioninsert($userData);
        $this->session->set_flashdata('success_msg', 'User data have been added successfully.');
        redirect('welcome/index1');
    }
}

Quick Notes #

• If you need to allow files larger than 5MB, just update the max_size value (multiply MB by 1024 to get KB) and adjust the PHP limits accordingly.
• The added error handling will show users exactly why their upload failed (e.g., "The file you are attempting to upload is larger than the permitted size.").

内容的提问来源于stack exchange，提问作者Swathi