How to upload zip file in Codeigniter?

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

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$config = array(
    'upload_path' => './uploads/',  // the path where the uploaded zip file will be stored
    'allowed_types' => 'zip',       // allowed file types
    'max_size' => 1024,             // maximum file size in kilobytes
    'max_width' => 0,               // maximum width of the image in pixels
    'max_height' => 0,              // maximum height of the image in pixels
    'file_name' => 'myzipfile.zip'  // the name of the file to be uploaded
);

$this->upload->initialize($config);

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if ($this->upload->do_upload('zip_file')) {
    // file upload was successful
} else {
    // file upload failed
}

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$upload_data = $this->upload->data();

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class UploadController extends CI_Controller {
    
    public function process() {
        $config['upload_path'] = './uploads/';
        $config['allowed_types'] = 'zip';
        $this->load->library('upload', $config);

        if (!$this->upload->do_upload('zip_file')) {
            // Handle upload error
            $error = $this->upload->display_errors();
            echo $error;
        } else {
            // Upload success
            $data = $this->upload->data();
            $zip_path = $data['full_path'];

            // Extract the ZIP file
            $extract_dir = './uploads/extracted/';
            $this->zip->extract($zip_path, $extract_dir);

            // Process the extracted files
            // ...
        }
    }
}

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class UploadController extends CI_Controller {
    
    public function __construct() {
        parent::__construct();
        $this->load->helper('url');
        $this->load->library('zip');
    }
    
    // ...
}