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CodeIgniter: resizing image using SimpleImage

In CodeIgniter, ComSci on 12 July 2010 tagged programming with no comments (1,140 views)

The CodeIgniter (CI) framework is powerfull tool for rapid PHP application development. It has a lot of ready to use libraries and helpers. For example the Image Manipulation library resize function that lets you resize the original image, create a copy (with or without resizing), or create a thumbnail image. But, there is a minor problem when resize image with main ratio enabled. For example, if you want to resize an 256px x256px earth images below to 128px x 128px.

The snippet Controller code :

$config['image_library'] = 'gd2';
$config['source_image'] = FCPATH .'images/earth.jpg';
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config['width'] = 128;
 
$this->load->library('image_lib', $config);
$this->image_lib->resize();
 
if ( file_exists(FCPATH .'images/earth_thumb.jpg'))
{
	echo '<img src="/images/earth_thumb.jpg" alt="" />';
}

The result is 128px x 256px image :

Not as expected…until you have specified $config['height'] value :) like $config['height'] = 128 :)

Alternatively, there is excellent class called SimpleImage by Simon Jarvis. We can use this class as library in CodeIgniter. First, create file Simple_image.php inside system/application/libraries/ directory and paste the code from above link. After php tags add :

if ( ! defined('BASEPATH')) exit('No direct script access allowed');

Modify :

class SimpleImage {

To :

class Simple_image {

Dont forget to remove php closing tag (?>) at the end of the file as stated here. And let’s call the library inside the code :

$this->load->library('simple_image');
$this->simple_image>load(FCPATH .'images/earth.jpg');
$this->simple_image->resizeToWidth(128);
$this->simple_image->save(FCPATH .'images/earth_thumb.jpg');
 
if ( file_exists(FCPATH .'images/earth_thumb.jpg'))
{
	echo '<img src="/images/earth_thumb.jpg" alt="" />';
}

The code render image with correct size :

Image source: http://twitrounds.com/

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