WordPress at a glance
action is not described

wp_create_file_in_uploads action-hook . WP 2.1.0

Fires after the header image is set or an error is returned.

Usage

add_action( 'wp_create_file_in_uploads', 'action_function_name_6646', 10, 2 );
function action_function_name_6646( $file, $attachment_id ){
	// action...
}
$file(string)
Path to the file.
$attachment_id(int)
Attachment ID.

Where the hook is called

In file: /wp-admin/custom-header.php
wp_create_file_in_uploads
wp-admin/custom-header.php 776
do_action( 'wp_create_file_in_uploads', $file, $attachment_id ); // For replication
wp-admin/custom-background.php 485
do_action( 'wp_create_file_in_uploads', $file, $id ); // For replication
wp-admin/custom-header.php 786
$image = apply_filters( 'wp_create_file_in_uploads', $image, $attachment_id ); // For replication
wp-admin/custom-header.php 922
$cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication
wp-admin/custom-header.php 1252
$cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication
wp-admin/includes/ajax-actions.php 3255
$cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication.
wp-admin/includes/ajax-actions.php 3284
$cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication.

Where the hook is used (in WP core)

Does not used.