Add a hashtag to all Twitter sharing buttons on a site (in Scriptless 3.0.0)

twitter-modification.php

<?php

add_filter( 'scriptlesssocialsharing_twitter_query_args', 'prefix_add_twitter_hashtag_scriptless' );
/**
 * Add a hashtag to every Twitter button on a site.
 * Requires Scriptless Social Sharing 3.0.0
 * 
 * @param $query_args
 * @return mixed
 */
function prefix_add_twitter_hashtag_scriptless( $query_args ) {
	$query_args['text'] .= rawurlencode( ' #hashtag' );

	return $query_args;
}

Actually, this could be done in the current version of Scriptless with the scriptlesssocialsharing_twitter_text filter. Example:

add_filter( 'scriptlesssocialsharing_twitter_text', 'prefix_add_twitter_hashtag_scriptless' );
/**
 * Add a hashtag to every Twitter button on a site.
 *
 * @param $text
 * @return mixed
 */
function prefix_add_twitter_hashtag_scriptless( $text ) {
	return $text .= rawurlencode( ' #hashtag' );
}

Actually, this filter is also added in 3.0, so it's not available yet either. My apologies for the error.