WordPress at a glance
filter is not described

next_posts_link_attributes filter-hook . WP 2.7.0

Filters the anchor tag attributes for the next posts page link.

Usage

add_filter( 'next_posts_link_attributes', 'filter_function_name_2239' );
function filter_function_name_2239( $attributes ){
	// filter...

	return $attributes;
}
$attributes(string)
Attributes for the anchor tag.

Where the hook is called

get_next_posts_link()
next_posts_link_attributes
wp-includes/link-template.php 2229
$attr = apply_filters( 'next_posts_link_attributes', '' );

Where the hook is used (in WP core)

Does not used.