WordPress Code Reference

get_image_tag_class

Summery Summery

Filters the value of the attachment’s image tag class attribute.

apply_filters( 'get_image_tag_class', string $class, int $id, string $align, string|array $size )

$class: CSS class name or space-separated list of classes.
$id: Attachment ID.
$align: Part of the class name for aligning the image.
$size: Size of image. Image size or array of width and height values (in that order). Default 'medium'.

Changelog
Version	Description
2.6.0	Introduced.