[@robin-w Moderator 5 years, 6 months ago]

ok, so create a new topic form template

find
wp-content/plugins/bbpress/templates/default/bbpress/form-topic.php

transfer this to your pc and edit

change around line 199

<?php if ( ! bbp_is_single_forum() ) : ?>

to

<?php if (isset($_REQUEST['bbp_forum_id'])) : ?>
<input type="hidden" name="bbp_forum_id" value="<?php echo $_REQUEST['bbp_forum_id']; ?>" />
<?php elseif ( ! bbp_is_single_forum() ) : ?>

and save

create a directory on your theme called ‘bbpress’
ie wp-content/themes/%your-theme-name%/bbpress

where %your-theme-name% is the name of your theme

Then transfer the file you saved above and put in in the directory called bbpress that you created above, so you end up with
wp-content/themes/%your-theme-name%/bbpress/form-topic.php

bbPress will now use this template instead of the original

then put this in your child theme functions file

add_action ( 'bbp_template_before_single_forum', 'reww_new_topic_button' ) ;

function reww_new_topic_button () {
	$url = $url = get_home_url(); 
	$forum_id = bbp_get_forum_id() ;
	$url.='/topic-form/?bbp_forum_id='.$forum_id ;
	$text = 'create new topicc' ;
	echo '<a class="hello" href ="'.$url.'">'.$text.'</a>' ;
}

where ‘/topic-form/’ is the page you have the topic form on

that sends a query string to the topic form page, which is then picked up by the amended template above