php用流方式制作缩略图

其中db_mysql.inc.php,config.php,function.php不是真正使用到的，关键是filename 文件名,我是通过读取数据库中的图片名称

<?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;
?>

使用的时候可以把在html文件里加上

<img src=’showpic.php?id=xxx’ width=’50′ height=’50′>

showpic.php及上面的那个php文件,id=xxx是数据库里的记录ID,width是缩略图的宽,height是缩略图的高,请不要同时宽高都上,例如，你要实现宽为50的缩略图，只要<img src=’showpic.php?id=xxx’ width=’50′>这样就可以了

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