WordPress at a glance
filter is not described

image_edit_before_change filter-hook . WP 2.9.0

Deprecated in 3.5.0. It is no longer supported and can be removed in future releases. Use wp_image_editor_before_change instead.

Deprecated: 3.5.0 Use wp_image_editor_before_change instead.

Filters the GD image resource before applying changes to the image.

Usage

add_filter( 'image_edit_before_change', 'filter_function_name_5206', 10, 2 );
function filter_function_name_5206( $image, $changes ){
	// filter...

	return $image;
}
$image(resource)
GD image resource.
* @param array $changes Array of change operations.
$changes
-

Where the hook is called

image_edit_apply_changes()
image_edit_before_change
wp-admin/includes/image-edit.php 539
$image = apply_filters( 'image_edit_before_change', $image, $changes );

Where the hook is used (in WP core)

Does not used.