WordPress at a glance
filter is not described

widget_pages_args filter-hook . WP 2.8.0

Filters the arguments for the Pages widget.

Usage

add_filter( 'widget_pages_args', 'filter_function_name_7959', 10, 2 );
function filter_function_name_7959( $args, $instance ){
	// filter...

	return $args;
}
$args(array)
An array of arguments to retrieve the pages list.
$instance(array)
Array of settings for the current widget.

Changelog

Since 2.8.0 Introduced.
Since 4.9.0 Added the $instance parameter.

Where the hook is called

WP_Widget_Pages::widget()
widget_pages_args
wp-includes/widgets/class-wp-widget-pages.php 75-84
apply_filters(
	'widget_pages_args',
	array(
		'title_li'    => '',
		'echo'        => 0,
		'sort_column' => $sortby,
		'exclude'     => $exclude,
	),
	$instance
)

Where the hook is used (in WP core)

Usage not found!