Wordpress: load image automatically

gistfile1.txt

<?php
       //set images directory
        $directory = 'wp-content/themes/mizzou/images/banners/';
        try {
            // create slideshow div to be manipulated by the above jquery function
            echo "<div id=\"slideshow\">";
            //iterate through the directory, get images, set the path and echo them in img tags.
            foreach ( new DirectoryIterator($directory) as $item ) {
                if ($item->isFile()) {
                    $path = $directory . "/" . $item;
                    echo "<img src=\"" . $path . "\" />";
                }
            }
            echo "</div>";
        }
       //if directory is empty throw an exception.
        catch(Exception $exc) {
            echo 'the directory you chose seems to be empty';
        }
        ?>