WordPress at a glance
filter is not described

(field) filter-hook . WP 2.3.0

Filters the value of a specific post field for display.

The dynamic portion of the hook name, $field, refers to the post field name.

Usage

add_filter( '(field)', 'filter_function_name_1380', 10, 3 );
function filter_function_name_1380( $value, $post_id, $context ){
	// filter...

	return $value;
}
$value(mixed)
Value of the prefixed post field.
$post_id(int)
Post ID.
$context(string)
Context for how to sanitize the field. Possible values include 'raw', 'edit', 'db', 'display', 'attribute' and 'js'.

Where the hook is called

sanitize_post_field()
sanitize_bookmark_field()
sanitize_user_field()
wp-includes/post.php 2254
$value = apply_filters( "{$field}", $value, $post_id, $context );
wp-includes/bookmark.php 398
$value = apply_filters( "{$field}", $value, $bookmark_id, $context );
wp-includes/user.php 1232
$value = apply_filters( "{$field}", $value, $user_id, $context );

Where the hook is used (in WP core)

Does not used.