Check if an image size exists.

Scale down the default size of an image.

Scale an image to fit a particular size (such as ‘thumb’ or ‘medium’).

Retrieves the image’s intermediate size (resized) path, width, and height.

Retrieve width and height attributes using given width and height values.

Resizes an image to make a thumbnail or intermediate size.

Retrieves calculated resize dimensions for use in WP_Image_Editor.

Builds the Caption shortcode output.

Determines whether the value is an acceptable type for GD image functions.

Displays next image link that has the same post parent.