bbPress.org

oh, and just participants? ie Keymaster and moderators can post as many as they like?

This code should do it

add_filter ('bbp_current_user_can_access_create_topic_form' , 'rew_only_one_topic', 10 , 1) ;
add_filter( 'gettext', 'rew_change_text', 20, 3 );

function rew_only_one_topic ($retval) {
	//first check if they have access, only amend if they have
	if ($retval==true) {
		$user_id = wp_get_current_user()->ID;
		$role = bbp_get_user_role( $user_id );
		if ($role == 'bbp_participant') {
		$last_posted = bbp_get_user_last_posted( $user_id );
		if (time() <($last_posted + (60*60*24*31))) $retval = false ;
		}
	}
	return $retval ;
}

function rew_change_text($translated_text, $text, $domain ) {
	if ( $text == 'You cannot create new topics.') {
		$user_id = wp_get_current_user()->ID;
		$role = bbp_get_user_role( $user_id );
		if ($role == 'bbp_participant') {
			$last_posted = bbp_get_user_last_posted( $user_id );
			if (time() <($last_posted + (60*60*24*31))) {
				$translated_text = 'You cannot post a new topic - you have already posted a topic in the last month';
			}
		}
	}
	return $translated_text;
}

The 60*60*24*31 is 60 seconds, 60 minutes, 24 hours, 31 days, so you can change this to whatever you want in both places.

and you can change $translated_text = ‘You cannot post a new topic – you have already posted a topic in the last month’ to whatever phrase in whatever language you want.

Put this in your child theme’s function file –

ie wp-content/themes/%your-theme-name%/functions.php

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

or use

Code Snippets