# image_style_create_derivative not resizing the image

I am using image_style_create_derivative to create image styles on fly. Before that I am using image_style_path which creates style path.

$derivative_uri = image_style_path([style_name], [source]); image_style_create_derivative([style_name], [source],$derivative_uri)


It generates image. Which is fine. But it is generating image with original size. Not with the size of style_name.

For example if style name is thumbnail, the generated image style size should be 160x100.

How can I achieve it?

applying all image effects defined in $style['effects'] i usually use image_style_url like this (if taken from field), otherwise just pass the source. $field = field_view_field('node', $node,$field_name, reset($image),$arr_display);
if ($img_style) {$uri = image_style_url($img_style,$field[0]['#item']['uri']);
$uri = file_create_url($field[0]['#item']['uri']);