今天在网上看到这样两个例子
s1.php

<?php
session_start();
$_SESSION['var1']="中华人民共和国";
$sn = session_id();
$url="下一页";
echo $url;
?>

s2.php

<?php
session_id($_GET['s']);
session_start();
echo "传递的session变量var1的值为：".$_SESSION['var1'];
?>



第一次打开是能用的但是第二次以后打开就出现下面的错误



Warning: session_start() [function.session-start]: The session id contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in c:\AppServ\www\1.php on line 2
下一页
Warning: Unknown: The session id contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (C:\AppServ\php\session) in Unknown on line 0


我在用其他的例子测试session就不能用了
不知道为什么请各位指点指点

[ 本帖最后由 fengyun409 于 2006-5-21 10:37 AM 编辑 ]