image_downsize filter-hook . WP 2.5.0

Filters whether to preempt the output of image_downsize().

Passing a truthy value to the filter will effectively short-circuit down-sizing the image, returning that value as output instead.

Usage

add_filter( 'image_downsize', 'filter_function_name_8500', 10, 3 );
function filter_function_name_8500( $downsize, $id, $size ){
	// filter...

	return $downsize;
}

$downsize(true/false)

Whether to short-circuit the image downsize.
Default: false

$id(int)

Attachment ID for image.

$size(array/string)

Size of image. Image size or array of width and height values (in that order).
Default: 'medium'

Where the hook is called

if ( $out = apply_filters( 'image_downsize', false, $id, $size ) ) {

if ( $downsize = apply_filters( 'image_downsize', false, $attachment->ID, $size ) ) {

Where the hook is used (in WP core)