<?php
if (eregi("^([a-zA-Z0-9]+)+.+([a-z]{3,4})+$",$_GET['file']) && file_exists("unix/path/to/pics/".$_GET['file'])) {
	$filename = $_GET['file'];
	list($width, $height) = getimagesize($filename);
	$new_width = 101;
	$new_height = $new_width;
 
	$image_p = imagecreatetruecolor($new_width, $new_height);
 
	$s = getimagesize($filename);
	switch(strtolower($s['mime'])) {
		case "image/gif": $image = imagecreatefromgif($filename); break;
		case "image/jpeg": $image = imagecreatefromjpeg($filename); break;
		case "image/png": $image = imagecreatefrompng($filename);break;
		default: $image = imagecreatefromgif("http://mobibase.ru/img/noimage.gif"); //здесь замени на свое чтонть.
	}
 
	imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
	$black = imagecolorallocate($image_p,89,140,173);
	imagerectangle($image_p,0,0,100,100,$black);
	header('Content-type: image/jpeg');
	imagejpeg($image_p, null, 100);
} else {
	die();
}
?>
 

 
RewriteEngine On
RewriteBase /
RewriteRule ^([a-zA-Z0-9]+)+.+([a-z]{3,4})+$ /previews/preview.php?file=$1