Drupal Technical

[Drupal] How to programmatically apply an image style to an image in a Drupal 7 site?

Emily Mathew | | 1 min read

In one of my project I had a requirement to create an image in a particular image style in a specific folder, when uploading the image itself. In this article I will be explaining how to achieve this using the function image_style_create_derivative in drupal 7 to create an image in a particular image style. One another advantage of this function is that this will create the destination folder if it does not already exist.

The parameters of this function are,

  • $style - The $style is an image style array. If the image style is already created using configuration, we can get it by using the function image_style_load.
  • $source - The $source is the full path to the original image.
  • $destination - The $destination is the full path to the destination.

In order to create the image in an image style 'thumbnail' I have added the following code in the node_insert hook so that it will create the image when creating the node itself.


  

    /**

     * Implements the hook_node_insert.

     * Applying the image styles and store it in the destination directory.

     * 

     * @param object $node

     */

    function mymodule_node_insert($node) {

      if ($node->type == 'image') {

        $fid = $node->field_image[$node->language][0]['fid'];

        $style = image_style_load('thumbnail');

        $file = file_load($fid);

        $source = $file->uri;

        $destination = "full/path/to/destination/filename";

        image_style_create_derivative($style, $source, $destination);

      }

    }

The above code will create the image in the image style 'thumbnail' in the destination folder when creating the node itself.

References:

http://api.drupal.org/api/drupal/modules!image!image.module/function/im…

 

 

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