Broken Gallery Thumbnail Images

I've read several threads regarding broken thumbnail problems with notepad's excellent image gallery tutorial, I've tried the suggested solutions and I've obviously not found one that works. Here's exactly what's happening:

http://www.iansamuelharris.com/gallery/images.php
If you go to the address above you'll see that the page for the thumbnails is being generated and each thumbnail opens a larger image when clicked, but the thumbs themselves are broken image links.

I have the correct path (/home/iansam/iansamuelharris-www/gallery/) in config.php.

I have all three php files in /home/iansam/iansamuelharris-www/gallery/ as well.

Here's the content of my images.php file:
<?php

require_once('config.php');

// grab our navigation
$nav = isset($_REQUEST['nav']) ? urldecode($_REQUEST['nav']) : null;
if(isset($nav))
{
$crunch = explode('>', trim($nav));
foreach($crunch as $value)
{
// IMPORTANT! validate for teh h4x0rz
if(!ctype_alnum(str_replace(' ', '', $value)))
$invalid = true;
}
if($invalid)
$nav = null;
}

// decide what page of a paticular gallery we're viewing
$pg = isset($_REQUEST['pg']) && (ctype_digit($_REQUEST['pg']) || $_REQUEST['pg'] == 'all') ? $_REQUEST['pg'] : 0;
$viewall = is_numeric($pg) ? null : true;
$pg = intval($pg) <= 0 ? 1 : $pg;

// images per page
$section = ROWS * COLS;
// last possible ending point for images, depending which page we're on
$end = $section * $pg;
// starting point for images, depending which page we're on
$start = $end - $section;
// previous page
$prev = $pg - 1;
// next page
$next = $pg + 1;

// start table
print('<table border="0" align="center" cellpadding="1" cellspacing="1">');

// draw previous and next links
function navigator($total)
{
$p = '<a href="'.$_SERVER['PHP_SELF']
.'?nav='.rawurlencode($GLOBALS['nav'])
.'&pg='.$GLOBALS['prev'].'"><<</a>';
$n = '<a href="'.$_SERVER['PHP_SELF']
.'?nav='.rawurlencode($GLOBALS['nav'])
.'&pg='.$GLOBALS['next'].'">>></a>';
$a = '<a href="'.$_SERVER['PHP_SELF']
.'?nav='.rawurlencode($GLOBALS['nav'])
.'&pg=all">view all</a>';

// the navigation
print('<tr><td align="center" colspan="' . COLS . '">');

if(($GLOBALS['pg'] == 1 && $GLOBALS['end'] >= $total) || isset($GLOBALS['viewall']))
print('<< : view all : >>');
elseif($GLOBALS['pg'] == 1)
print('<< : '.$a.' : '.$n);
elseif($GLOBALS['end'] < $total)
print($p.' : '.$a.' : '.$n);
else
print($p.' : '.$a.' : >>');

print('</td></tr>');
}

// get directory tree
function directory($dir)
{
$mydir = opendir($dir);
while(false !== ($file = readdir($mydir)))
{
if($file != "." && $file != "..")
{
if(is_dir($dir.$file))
{
chdir('.');
$tree[$file] = directory($dir.$file.'/');
chdir('..');
}
else
{
$size = getimagesize($dir.$file);
if(in_array($size['mime'], unserialize(TYPE)))
$tree[] = $file;
}
}
}
closedir($mydir);
return $tree;
}
$tree = directory(PATH);

// display category links and images
function display_body($navtree)
{
if(isset($GLOBALS['nav']))
{
// we'll need the path as a directory for displaying images
for($i=1; $i<count($GLOBALS['crunch']); $i++)
$uri .= !is_numeric($GLOBALS['crunch'][$i]) ? $GLOBALS['crunch'][$i].'/' : '';
}

if(is_array($navtree))
{
if(!is_numeric(implode('', array_keys($navtree))))
{
print('<tr><td>');
foreach($navtree as $key=>$value)
{
if(!is_int($key))
{
if(is_array($value))
print('<a href="'.$_SERVER['PHP_SELF']
.'?nav='.rawurlencode($GLOBALS['nav']
.'>'.$key).'">'.$key.'</a><br />');
else
print($key.'<br />');
}
}
print('</td></tr>');
}
else
{
// decide how many rows to display
$total = count($navtree);
if(isset($GLOBALS['viewall']))
{
$check = $total / COLS;
$rows = is_int($check) ? $check : floor($check) + 1;
}
else
$rows = ROWS;

navigator($total);
for($i=0; $i<$rows; $i++)
{
print('<tr>');
for($n=0; $n<COLS; $n++)
{
$index = $GLOBALS['start']++;
$image = $index < $total ? $navtree[$index] : '&nbsp;';
print('<td align="center" width="'.THMBWIDTH.'" height="'.THMBHEIGHT.'">');
if($image != '&nbsp;')
{
print('<a href="'.$_SERVER['PHP_SELF']
.'?nav='.rawurlencode($GLOBALS['nav']
.'>'.$index).'">');
print('<img src="imgsrc.php?src='
.PATH.rawurlencode($uri).$image.'" border="0" />');
print('</a>');
}
else
print($image);

print('</td>');
}
print('</tr>');
}
navigator($total);
}
}
elseif(file_exists(PATH.$uri.$navtree))
{
$root = explode('/', dirname(PATH.'.'));
print('<tr><td><img src="'.$uri.$navtree.'"></td></tr>');
}
else
print('<tr><td>invalid request</td></tr>');
}

// navigate appropriate categories
function categories($navtree)
{
if(isset($GLOBALS['nav']))
{
for($i=1; $i<count($GLOBALS['crunch']); $i++)
$navtree = &$navtree[$GLOBALS['crunch'][$i]];

display_body($navtree);
}
else
display_body($navtree);
}
categories($tree);

// end table
print('</table>');

?>

And here's my config.php file:
<?php
// main images directory
define('PATH', '/home/iansam/iansamuelharris-www/gallery/');
?>
<?php
// valid MIME types, all other files will be ignored
define('TYPE', serialize(array('image/jpg', 'image/jpeg', 'image/pjpeg')));
?>
<?php
// how many rows of images to display per page
define('ROWS', 3);

// how many columns of images to display per page
define('COLS', 5);
?>
<?php
// maximum thumbnail width
define('THMBWIDTH', 100);

// maximum thumbnail height
define('THMBHEIGHT', 100);
?>

It appears that everything is working fine except for the thumbnail creation.

Thanks in advance for any help anyone can offer.

when i visit your link, i get the msg:
Warning: getimagesize(): Read error! in /home/iansam/iansamuelharris-www/gallery/images.php on line 91

which could hint at a permissions issue. also, viewing the properties of one of your thumbnails gives me this address: http://www.iansamuelharris.com/pages/photos/images/imgsrc.php?src=/home/iansam/iansamuelharris-www/gallery/ian%2F05-11-04001.jpg

that confuses me. if you're storing the images and gallery files in:
http://www.iansamuelharris.com/gallery/
then why is it using the location:
http://www.iansamuelharris.com/pages/photos/images/
? where is it getting that address? it's nowhere in your code to be found.

manually modifying that address to the supposed appropriate location just spits out header errors:
http://www.iansamuelharris.com/gallery/imgsrc.php?src=/home/iansam/iansamuelharris-www/gallery/ian%2F05-11-04001.jpg

hope that helps.

PS the updated source for this gallery (that i've been improving here and there) has a web-based admin interface, image descriptions, as well as improved category display/navigation.

if you'd like a copy just gimmie your e-mail. i should probably add it to the code section as well, hmm yes..

Looks like something very weird is going on. When I pasted that link into my message I then pasted it into my browser to make sure it was correct and I didn't get that error. Very screwy. Thanks for trying to help, but it appears I've got something going on with my server that I need to get straightened out before I can get this gallery running.

I'd very much like the newer version of your gallery code. My address is sammy(at)candlemann(dot)com.

some browsers won't display PHP generated warnings, i'm using IE just for your reference. and i'll e-mail that later tonight.