[WordPress] Referer for password protected posts

password-form-referer.php

<?php

/*
	On an archive-type page, password-protected posts can be odd.
	If the post is near the bottom, hitting submit reloads the page
	taking you back to the top. This will simply change the referer
	so that you are brought back to the post after clicking the
	submit button on the password form.
*/

add_filter('the_password_form', 'the_password_form_referer');
function the_password_form_referer( $form ) {
	global $post;
	$ref = is_single() ? '' : "<input type='hidden' name='_wp_http_referer' value='{$_SERVER[REQUEST_URI]}#post-{$post->ID}' />";
	$output = str_replace('</form>', $ref .'</form>', $form );
	return $output;
}