PHP和SWF - 幻灯片放映不显示

I am trying to display a slideshow. slide_auto.php is in the same directory as my slideS_img folder

Here is my slide_auto.php file:

<?php
$file_dir="slideS_img"; //change this to a folder name
$show_titles=false; //change to false if you don't want to see the captions
$omit_chars=0; //how many characters to cut off the title's front
$link_to_image=false; //do you want to display links?

print '<?xml version="1.0" encoding="iso-8859-1"?>
<slideshow  displayTime="5" 
            transitionSpeed=".7"
            ...more code...
            >';

            $dir=opendir($file_dir);
        $xml_string= array();
            while ($file=readdir($dir))
            {
                if(substr($file, -3) == "jpg" || substr($file, -4) == "jpeg" ){
                $tmp_str = '<image img="'.$file_dir.'/'.$file.'" ';
                if($show_titles){
                    $file_title=substr($file, $omit_chars, strpos($file, ".")-$omit_chars);
                    $tmp_str .= 'caption="'.$file_title.'" ';

                }

                if($link_to_image){
                    $link_title=substr($file, $omit_chars, strpos($file, ".")-$omit_chars);
                    $tmp_str .= 'link="'.$file_dir.'/'.$file.'" target="_blank"';

                }

                    $tmp_str .=" />";
                    array_push($xml_string, $tmp_str);
                }


            }
            sort($xml_string);
            for($i=0; $i<count($xml_string); $i++){
            print $xml_string[$i];
            }
closedir($dir);
print '</slideshow>';
?>

amd my slideshowpage.php:

<?php
require_once('slideshow/slide_auto.php')
?>

<!DOCTYPE>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>

<body>
<div align="center">
<br />
<br />
<br />
<div id="flashcontent">
  This text is replaced by the Flash movie.
</div>

<script type="text/javascript">
   swfobject.embedSWF("slideshow.swf?file=slideshow/slide_auto.php", "gallery", "100%", "100%", "7", "#333333");
   so.write("flashcontent");
</script>
</div>
</body>
</html>

I get an error saying Warning: opendir(slideS_img) [function.opendir]: failed to open dir: No such file or directory in /[path]/slideshow/slide_auto.php on line 62

Any help? Thank you

Marc is actually right in his solution. If I could try to elaborate a bit, when you include slide_auto.php, you can think the following happening:

PHP inserts the text from the file slide_auto.php, where the include command is found.
So, when $file_dir="slideS_img"; comes up it tries to find the directory under slideshowpage.php, not slide_auto.php.

This fails because the actual image folder is in directory slideshow.

If you call slide_auto.php directly (or within the Flash application), then its directory is slideshow, and you should be able to get the XML without any further errors.

included files assume the working directory of the file you've included them from. Your parent slideshowpage script is in (say)

 /home/sites/example.com/html

which will become the working directory of your slideshow script. So the opendir is actually being done as

 /home/sites/example.com/html/slideS_img

instead of

 /home/sites/example.com/html/slideshow/slideS_image

You'll have to modify your opendir call to use a more specific directory.