session_register()问题

[antidestiny]

我写了一个测试语句
<?php
session_register('aaa');

phpinfo();
?>

运行结果:
Warning: session_register(): Cannot send session cookie - headers already sent by (output started at C:\Program Files\PHP Expert Editor\php160.tmp:3) in C:\Program Files\PHP Expert Editor\php160.tmp on line 4

Warning: session_register(): Cannot send session cache limiter - headers already sent (output started at C:\Program Files\PHP Expert Editor\php160.tmp:3) in C:\Program Files\PHP Expert Editor\php160.tmp on line 4

php.ini中的session.save_path也设置了,不知道怎么还是不行????

[turtlevan]

1.
确定<?php之前没有任何空格或者换行

2.
先调用session_start();

[mistjin]

同上！！！session_start();

[feel8]

session_start()之前不能有输出。

If you want your script to work regardless of register_globals, you need to instead use the $_SESSION array as $_SESSION entries are automatically registered. If your script uses session_register(), it will not work in environments where the PHP directive register_globals is disabled.

[ninjakoei]

<?php
session_start();//这个最好要用在你所有使用session的PHP网页的最顶部，
session_register('aaa');

phpinfo();
?>

[ashchen]

如果你的浏览器版本高就没这个问题了，IE6.0好像会忽略header重发的情况
还有写入session的语句不要这样写了，关于session的新写法请查看相关资料
老的教科书过时了
下面是英文的一段描述，自己看看，如果看不懂英文就不要再写程序了，改行吧

If you want your script to work regardless of register_globals, you need to instead use the $_SESSION array as $_SESSION entries are automatically registered. If your script uses session_register(), it will not work in environments where the PHP directive register_globals is disabled.

register_globals: important note:
Since PHP 4.2.0, the default value for the PHP directive register_globals is off. The PHP community encourages all to not rely on this directive but instead use other means, such as the superglobals.

Caution:
This registers a global variable. If you want to register a session variable from within a function, you need to make sure to make it global using the global keyword or the $GLOBALS[] array, or use the special session arrays as noted below.

Caution:
If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered(), and session_unregister().

[ashchen]

下载一份PHP手册最新版，最新的是12，CHM的，一定要英文的，中文的也可以备一份，不过翻译的不完整还有乱码，很多问题可以查一下，强迫自己看英文，chm有索引功能，比较方便。

我觉得给人家猎物不如告诉人家狩猎的方法

[xuzuning]

1、session_register前一定要有session_start()
2、确保被session_register的变量是全局变量
3、session_register只适用于php4.0.x

[cloudchen]

应该在新版的php已经没必要用session_register了

直接对$_SESSION["foo"]进行赋值/取值就可以了，和asp中一样。