upload_file_CI.php

<!-- view -->
<input type="file" class="form-control" id="image" name="image" required>

<?php 
// Controller
// fungsi insert
	public function store(){
		$config['upload_path'] = './assets/produk/';
		$config['allowed_types'] = 'gif|jpg|png';
		$config['max_size']	= '20000';
		$this->load->library('upload', $config);

		if ( ! $this->upload->do_upload('image')){
			redirect('admin/produk');
		}
		else{
			$data = array(
				'nama_produk' => $this->input->post('nama_produk'),
				'deskripsi' => $this->input->post('deskripsi'),
				'image_produk' => $_FILES['image']['name'],
			);
			$this->produk->insert($data);
			redirect('admin/produk');
		}
	}
	
// fungsi update
	public function update($id){
		$config['upload_path'] = './assets/produk/';
		$config['allowed_types'] = 'gif|jpg|png';
		$config['max_size']	= '20000';
		$this->load->library('upload', $config);
		if ($_FILES['image']['name'] != '') {
			if ( ! $this->upload->do_upload('image')){
				redirect('admin/produk');
			}
			else{
				$model = $this->loadModel($id);
				if ($this->deleteGambar($model->image_produk)) {
					$data = array(
						'nama_produk' => $this->input->post('nama_produk'),
						'deskripsi' => $this->input->post('deskripsi'),
						'image_produk' => $_FILES['image']['name'],
					);
					$this->produk->update($id, $data);
					redirect('admin/produk');
				}
			}
		}else{
			$data = array(
				'nama_produk' => $this->input->post('nama_produk'),
				'deskripsi' => $this->input->post('deskripsi'),
			);
			$this->produk->update($id, $data);
			redirect('admin/produk');
		}
	}
?>