防盗链之来源检测
<?php
$ref = parse_url($_SERVER['HTTP_REFERER']);
if($ref['host']<>$_SERVER['HTTP_HOST']){
$r['ok']=0;
}else{
$url=$_POST['url'];
$a=parse_url($url);
$path=trim($a['path'],'/');
$etime=time()+600; //10分钟后过期
$key='nihaowoyehao68';
$sign = substr(md5($key.'&'.$etime.'&'.$path), 12, 8).$etime;
$r['sign']=$sign;
$r['ok']=1;
}
echo json_encode($r);