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image protection in codeigniter
//function to protect images from being accessed directly.
function getImage($img_id){


      //code to authenticate user goes here then...
$url = $this->data['base_url'].'system/application/images/c/thumbs/';

$filepath = $url.$img_id;

    header("Content-type: image/jpeg");
  if(file_exists($filepath)){
    echo "we are here";
        $img_handle = imagecreatefromjpeg($filepath) or die("");
    echo $img_handle;
        ImageJpeg($img_handle);
    }


    }

<img src='<?php echo base_url(); ?>index.php/Controller/getImage/obama.jpg' width="100px">

header("Content-type: image/jpeg");
if(file_exists($filepath)){
    echo "we are here";
    $img_handle = imagecreatefromjpeg($filepath) or die("");
    echo $img_handle;
    ImageJpeg($img_handle);
}