php图片文件 下载文件 防盗链设置方法_PHP教程

session_start();
session_register(‘check’);
$_SESSION[‘check’]=true;
?>

session_start();
$refs = parse_url($_SERVER['HTTP_REFERER']); //分解参考网页资讯
//检查首页session及来源主机是否相同
if(!($_SESSION['check']) || $refs['host'] != $_SERVER['HTTP_HOST'])
exit;

?>

SetEnvIfNoCase Referer "^" local_ref=1

Order Allow,Deny
Allow from env=local_ref

[ISAPI_Rewrite]
# 3600 = 1 hour
CacheClockRate 3600
RepeatLimit 32
# Protect httpd.ini and httpd.parse.errors files
# from accessing through HTTP
RewriteCond Host: (.+)
RewriteCond Referer: (?!http://1.*).*
RewriteRule .*.(?:gif|jpg|png|bmp) /force.gif [I,O]