Troubles with Simple PHP Application Challenge task 3 about associative array

By the end of this code challenge, we'll REMOVE from the page all the information about the original movie ("Back to the Future") and REPLACE it with information about the new movie ("The Empire Strikes Back"). Right now, the <h1> element has the title of the original movie as a static piece of text. Replace that with a PHP command that INSTEAD displays the title of the new movie from the array. (Be sure to leave the <h1> tags, the parentheses, and the year intact.)

And i already wrote this below.

<h1><?php echo $movie["title"]; ?>(1985)</h1>
<?php
$movie = array("title" => "The Empire Strikes Back");
?>
<table>
<tr>
<th>Director</th>
<td>Robert Zemeckis</td>
</tr>
<tr>
<th>IMDB Rating</th>
<td>8.5</td>
</tr>
<tr>
<th>IMDB Ranking</th>
<td>53</td>
</tr>
</table>

It doesn´t work. and i don't know what wrong? and this is link to a Challenge task (task 3) http://teamtreehouse.com/library/build-a-simple-php-application/listing-inventory-items/associative-arrays