Codeigniter Image uploading issue - php

Question

I am working on codeigniter project. All is working on my localhost. Now i have shifted all the things on server. I am also using cloudfare.
the problem is when i try to upload image it shows me blank screen. Following is my controller code.
// Add Data
function add(){
$data['pageTitle']=$this->lang->line('siteTitle');
// Breadcrumbs
$this->breadcrumbs->push('Dashboard','admin/dashboard');
$this->breadcrumbs->push('Category List','admin/category/index');
$this->breadcrumbs->push('Add Category','admin/category/add');
// Load View
// Form Submit
$this->form_validation->set_rules('_cat_title','Title','required|is_unique[pu_project_category.c_title]');
$this->form_validation->set_rules('_cat_slug','Slug','required');
$this->form_validation->set_rules('_cat_desc','Description','required');
if($this->form_validation->run()==TRUE){
if($this->upload->do_upload('_cat_image')){
$image=$this->upload->data();
$image=$image['file_name'];
}else{
$image='No Image';
}
$data['resUpload']=$this->upload->display_errors();
$data['res']=$this->Category_Model->add($image);
}
// Load View
$this->load->view('admin/common/header',$data);
$this->load->view('admin/common/left-sidebar',$data);
$this->load->view('admin/category/add',$data);
$this->load->view('admin/common/footer',$data);
}
Following is configuration code for uploading file,
// Upload Configuration
$config['upload_path'] = './project_images/';
$config['allowed_types'] = 'gif|jpg|png|jpeg|zip';
$config['max_size'] = '2000';
$this->load->library('upload', $config);
$this->upload->initialize($config);
Please help me to solve this problem and tell me where i doing wrong.

Answer 1

try this
public function add()
{
$this->form_validation->set_rules('_cat_slug','Slug','required');
if($this->form_validation->run() == TRUE)
{
$this->load->model('welcome_model');//change this with your model
//image upload
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'png|gif|jpg|jpeg';
$config['max_size'] = '7000';
$this->load->library('upload',$config);
if ( ! $this->upload->do_upload('image'))
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('upload_view', $error); //loads the view display.php with error
}
$upload_data=$this->upload->data();
$image=$upload_data['file_name'];
$this->load->view('upload_view');
$data= array(
'_cat_slug' => $this->input->post('_cat_slug'),
'image' => $image
); //loads view display.php with data
$this->welcome_model->registre($data);//change this with your model function name
}
else
{
echo validation_errors();
}
}