/**
 * 查看二维码图片
 * @param $code
 */
function img($code){
    $this->load->library(‘QRCode‘);
    $url = ‘http://‘.$code;
    QRCode::png($url, FALSE, QR_ECLEVEL_L, 8);
}

处理图片

echo file_get_contents("/tmp/404_03.png");
$str = base64_encode(file_get_contents("/tmp/404_03.png"));
echo "<img src=‘data:image/png;base64,{$str}‘>";

查看二维码图片