reply.php BuddyPress

<?php
global $bp;

if(!is_user_logged_in()) :

	bp_core_add_message( __('You must be logged in to post a comment', 'buddypress' ), 'error');

else :

  	if(!check_admin_referer('new_activity_comment', '_wpnonce_new_activity_comment')) :

		bp_core_add_message(__('There was an error posting that reply, please try again.', 'buddypress' ), 'error');

  	else :

		$activity_id = apply_filters('bp_activity_post_comment_activity_id', $_POST['comment_form_id']);
		$content 	 = apply_filters('bp_activity_post_comment_content', $_POST['ac_input_' . $activity_id]);

		$comment_id = bp_activity_new_comment(array(
					'content' 	  	=> $content,
					'activity_id'	=> $activity_id,
					'parent_id' 	=> $parent_id));

		if(empty($content)) :
			 bp_core_add_message(__('Please add a comment.', 'buddypress' ), 'error');
			 bp_core_redirect(wp_get_referer() . '#ac-form-' . $activity_id);
		endif;

		if(empty($comment_id)) :
			 bp_core_add_message(__('There was an error posting that reply, please try again.', 'buddypress' ), 'error');
			 bp_core_redirect(wp_get_referer() . '#ac-form-' . $activity_id);
		else :
			 bp_core_add_message(__('Comment posted successfully', 'buddypress'));
			 bp_core_redirect(wp_get_referer() . '#ac-form-' . $activity_id);
		endif;

	endif;

endif;