How to programmatically delete an image style in Drupal?

Question

Need help trying to figure out how to programmatically delete an image style in Drupal 7.

Answer 1

$image_style = image_style_load('IMAGE_STYLE');
image_style_delete($image_style);

See https://api.drupal.org/api/drupal/modules!image!image.module/function/image_style_delete/7

You may need to flush the image style cache before it'll let you delete it. You can do that with:

image_style_flush($image_style);

For more info, see:

1. https://api.drupal.org/api/drupal/modules!image!image.module/function/image_style_flush/7
2. http://www.benmarshall.me/programmatically-create-delete-image-styles-drupal/

Answer 2

<?php
// Load the style.
$style = image_style_load('styleName');
// Flush images associated with the style.
image_style_flush($style);
// Delete the style.
image_style_delete($style);
?>

This will not work on the default styles. It is recommended to not remove them, since a number of Drupal modules depends on it.

Update:

If you've modified the default styles (Thumbnail, Medium, Large), you cannot delete them. Instead, you can just revert them back to their original settings, like this.

<?php
// Load the style.
$style = image_style_load('styleName');
// Flush images associated with the style.
image_style_flush($style);
// Revert the style.
image_default_style_revert($style);
?>