apply_filters( ‘image_get_intermediate_size’, array $data, int $post_id, string|int[] $size )

Parameters

$dataarray

Array of file relative path, width, and height on success. May also include file absolute path and URL.

$post_idint

The ID of the image attachment.

$sizestring|int[]

Requested image size. Can be any registered image size name, or an array of width and height values in pixels (in that order).