<?php
$dirFiles = array();
// opens images folder
if ($handle = opendir('Images')) {
    while (false !== ($file = readdir($handle))) {

    	// strips files extensions      
    	$crap   = array(".jpg", ".jpeg", ".JPG", ".JPEG", ".png", ".PNG", ".gif", ".GIF", ".bmp", ".BMP", "_", "-");    

    	$newstring = str_replace($crap, " ", $file );   


    	// hides folders, writes out ul of images and thumbnails from two folders

        if ($file != "." && $file != ".." && $file != "index.php" && $file != "Thumbnails") {
        	$dirFiles[] = $file;
        }
    }
    closedir($handle);
}

sort($dirFiles);
foreach($dirFiles as $file)
{
    echo "<li><a href=\"Images/$file\" class=\"thickbox\" rel=\"gallery\" title=\"$newstring\"><img src=\"Images/Thumbnails/$file\" alt=\"$newstring\" width=\"300\"  </a></li>\n";
}

?>







<?php 

/* function:  generates thumbnail */
function make_thumb($src,$dest,$desired_width) {
	/* read the source image */
	$source_image = imagecreatefromjpeg($src);
	$width = imagesx($source_image);
	$height = imagesy($source_image);
	/* find the "desired height" of this thumbnail, relative to the desired width  */
	$desired_height = floor($height*($desired_width/$width));
	/* create a new, "virtual" image */
	$virtual_image = imagecreatetruecolor($desired_width,$desired_height);
	/* copy source image at a resized size */
	imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
	/* create the physical thumbnail image to its destination */
	imagejpeg($virtual_image,$dest);
}


function get_files($images_dir,$exts = array('jpg')) {
	$files = array();
	if($handle = opendir($images_dir)) {
		while(false !== ($file = readdir($handle))) {
			$extension = strtolower(get_file_extension($file));
			if($extension && in_array($extension,$exts)) {
				$files[] = $file;
			}
		}
		closedir($handle);
	}
	return $files;
}


function get_file_extension($file_name) {
	return substr(strrchr($file_name,'.'),1);
}

 ?>


<?php 

/** settings **/
$images_dir = '/img/hersteller/';
$thumbs_dir = '/img/hersteller/thumb/';
$thumbs_width = 200;
$images_per_row = 3;

$image_files = get_files($images_dir);
if(count($image_files)) {
	$index = 0;
	sort($thumbnail_image);
	foreach($image_files as $index=>$file) {
		$index++;
		$thumbnail_image = $thumbs_dir.$file;
		if(!file_exists($thumbnail_image)) {
			$extension = get_file_extension($thumbnail_image);
			if($extension) {
				make_thumb($images_dir.$file,$thumbnail_image,$thumbs_width);
			}
		}
		echo '<a href="',$images_dir.$file,'" class="unterseitenbild"><img src="',$thumbnail_image,'" /></a>';
		if($index % $images_per_row == 0) { echo '<div class="clear"></div>'; }
	}
	echo '<div class="clear"></div>';
}
else {
	echo '<p>Keine Bilder vorhanden!</p>';
}

?>