WordPress at a glance
filter is not described

wp_handle_upload filter-hook . WP 1.0

This filter is documented in wp-admin/includes/file.php

Usage

add_filter( 'wp_handle_upload', 'filter_function_name_8898', 10, 2 );
function filter_function_name_8898( $array, $string ){
	// filter...

	return $array;
}
$array
-
$string
-

Where the hook is called

wp_upload_bits()
wp_handle_upload
_wp_handle_upload()
wp_handle_upload
wp-includes/functions.php 2745-2754
return apply_filters(
	'wp_handle_upload',
	array(
		'file'  => $new_file,
		'url'   => $url,
		'type'  => $wp_filetype['type'],
		'error' => false,
	),
	'sideload'
);
wp-admin/includes/file.php 948-956
return apply_filters(
	'wp_handle_upload',
	array(
		'file' => $new_file,
		'url'  => $url,
		'type' => $type,
	),
	'wp_handle_sideload' === $action ? 'sideload' : 'upload'
);

Where in WP core the hook is used WordPress

Usage not found.