Template:WPBannerMeta/hooks/image needed/doc

This hook allows a note to be displayed which alerts editors that an image is needed. It will also populate one or more relevant categories depending on the options which have been set.

Basic parameters

 *   (Required) - the parameter to trigger this note.
 *   (Required) - the 'category' parameter must be passed through the template to enable category optout.
 *   - allows the editor to specify the location of the requested image.
 *   - a default category when the location is not specified or leads to a non-existent category.

Advanced parameters

 * (Optional) - specifies the size of the icon; the default is 20px.
 * (Optional) - specifies the icon to be used (without the File namespace prefix); the default is Camera-photo.svg.
 *   - allows an editor to specify more details about the required image.
 *   - allows the editor to specify the type of image required, e.g. map, photograph, diagram, etc.
 *   - allows an editor to specify a topic area that the photograph relates to.
 *   - a default category in case the topic is not specified or leads to a non-existent category.