WP Subtitle Plugin Problem

Question

I'm having some problems getting the WP Subtitle plugin to work.

After inserting the <?thesubtitle()?> or <?getthe_subtitle($id)?> into the index.php template I get a 'call to undefined function' error - inside or outside the loop doesn't seem to matter!

Thanks in advance

//Update

In most pages the following now works thanks to toscho's updated syntax

<?php get_header(); ?>

<div class="title-posts-container">
<h2 class="title-posts"><?php the_title(); ?></h2>
<p class="title-posts-strap"><?php the_subtitle(); ?></p>
</div>

<div class="content">
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

But no such joy in index.php where the following fails

<?php get_header(); ?>

<div class="title-posts-container">
<h2 class="title-posts"><?php the_title(); ?></h2>
<p class="title-posts-strap"><?php the_subtitle(); ?></p>
</div>

<div class="content">

<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>

Answer 1

Try the correct syntax:

<?php the_subtitle(); ?>
<?php get_the_subtitle( $id ); ?>