CodeIgniter IMG – thumbnails on the fly

CodeIgniter IMG – thumbnails on the fly
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CodeIgniter library to generate high quality thumbnails

Library is based on excellent * Smarty plugin “Thumb” * created in 2005 by Christoph Erdmann. This version is a little different, we are using core from Thumb, and some modification which gives more flexibility to work with it.


  • thumbnails are generated “on the fly” no additional actions required,
  • cache for generated thumbnails,
  • clear structure for generated thumbnails,
  • thumbnails sharpening function,
  • cropping function,
  • fill space function


You need to upload file img.php into directory application/libraries. In controller you need to load library:


In view, you can use function with these parameters:

echo $this->img->rimg($filename, array('longside' => 745, 'alt' => 'alt text')


longside – width of the longest side (pixel value),
shortside – width of shorter side
crop – cropping (true/false)
width – fixed width (with this parameter you need also set height)
height – height (with this parameter you need to also set height)
sharpen – sharp image after scale
nocache – rewrite existing file in the cache


Documentation is located at


Just put img.php file in libraries path.

Download CodeIgniter IMG