以下 是两个程序页面，想在1.php定义session变量，在2.php中显示他，但是老是显示不了，而且每个显示页面在session-start()那个位置老是提示： **************************************************错误提示 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at F:\software_en\php\php\test\myly\upload\session.php:2) in F:\software_en\php\php\test\myly\upload\session.php on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at F:\software_en\php\php\test\myly\upload\session.php:2) in F:\software_en\php\php\test\myly\upload\session.php on line 3 ********************************************** //========1.php============ <? session_start(); session_register("session_user"); session_register("session_name"); $session_user ="keith"; $session_name = "hi"; ?> sdfasd //=============2.php=============== <?php session_start(); $t=$session_user; echo $t."
"; if ($t=='keith') { echo "test"; } else { echo"failure"; } ?>