Image thumbnails from a directory do no display

My script below is supposed to display thumbnail image links of images in a directory. My problem is the images do not display but that "x" which is displayed when the image is not found. How ever the filename is displayed below that "x" as a link and when I click it it open that specific file... What could be wrong in my script?

I am new on PHP and this is frustrating me as I need this thing going ASAP


THE SCRIPT

<table border="1" cellpadding="5" cellspacing="5" bordercolor="#CCCCCC">
<?php

// Render the images in their rows
foreach( $directories as $directory => $images ){
$directory = substr( $directory, strlen( getcwd() ) + 1 );
echo (
str_replace
(
array(
'[[images_per_row]]',
'[[directory_name]]',
),
array(
$images_per_row,
($directory)?$directory:'[[current]]'
),
'<tr><td colspan="[[images_per_row]]"><b>[[directory_name]]</b></td></tr>'
)
);
$rows = ceil(count($images)/$images_per_row);
for( $y = 0; $y < $rows; $y++ ){
echo( '<tr>' );
for( $x = 0; $x < $images_per_row; $x++ ){
$index = $x + ( $y * $images_per_row );
if( $index < count( $images ) ){
echo
(
str_replace
(
array(
'[[path]]',
'[[image_name]]',
'[[width]]',
'[[height]]'
),
array(
(($directory)?$directory.'/':''),
$images[ $index ],
$max_width,
$max_height
),
'<td width="1%"><a href="[[path]][[image_name]]"><img border="0" src="get_image.php?image_name=[[path]][[image_name]]&width=[[width]]&height=[[height]]"><br>[[image_name]]</a></td>'
)
);
}
}
echo( '</tr>' );
}
}
?>
</table>

 

Probably the problem is in get_image.php. you have to check there how you try to print thumb img and why the script set this [X] img...
.. you have to check List of Supported Protocols/Wrappers and see whether do you have error in functions, used by you.
Do you have this in get_image.php :
Header("Content-type: image/jpeg");