PHP技术进阶：php用流方式制作缩略图

<?php
include_once ('inc/db_mysql.inc.php');
include_once ('inc/config.php');
include_once ('class/function.php');

global $picPath;

if (strstr($_SERVER[HTTP_USER_AGENT],"MSIE")) {
  $attachment='';
} else {
  $attachment=' atachment;';
}

$image=getInfo('newssp_gallery','id',$_GET['id']);

$filename=$picPath.$image['filename'];

if (!file_exists($filename)) {
  $filename=$picPath."notexist.gif";
}

header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");                 // HTTP/1.0

header("Content-disposition:".$attachment." filename=".$image['original']);

$size=@filesize($filename);

header("Content-Length: $size");

$fd=@fopen($filename,rb);
$contents=@fread($fd,$size);
@fclose ($fd);

echo $contents;
?>