set_post_thumbnail_size()

set_post_thumbnail_size() — Registers an image size for the post thumbnail.

Inputs: $width (int): Image width in pixels. $height (int): Image height in pixels. $crop (bool|array): Optional. Image cropping behavior. If false, the image will be scaled (default). If true, image will be cropped to the specified dimensions using center positions. If an array, the image will be cropped using the array to specify the crop location: Field $0 (string): The x crop position. Accepts ‘left’, ‘center’, or ‘right’. Field $1 (string): The y crop position. Accepts ‘top’, ‘center’, or ‘bottom’.