以下代码程序出现warning！ [php] <? //error_reporting(E_ALL); include "../config/config.ini.php"; include "../include/func.php"; include "../include/header.html"; if (empty($func)) $func = "show_login"; ?> <? if ($func == "show_login") { echo "

"; table_start(774, "myadmin"); form_start("$PHP_SELF?func=test_login"); input("text", "name", "user", 20); input("password", "password", "password", 20); form_end(); table_end(); echo "

"; } if ($func == "test_login") { if(empty($user)) { $telerror="No username!"; error_msg("$telerror",""); } if(empty($password)) { $telerror="No password!"; error_msg("$telerror",""); } $user=trim($user); $password=trim($password); $result=mysql_query("select * from admin where user='$user' and password='$password'"); if(empty($result)) { Session_Start(); $_SESSION = array(); session_destroy(); } else { Session_Start(); $_SESSION['adminname']=$user; redirect("./index.php"); } } ?> <? include "../include/footer.html"; ?> [/php] 下面的就没有 [php]<? Session_Start(); //error_reporting(E_ALL); include "../config/config.ini.php"; include "../include/func.php"; include "../include/header.html"; if (empty($func)) $func = "show_login"; ?> <? if ($func == "show_login") { echo "

"; table_start(774, "myadmin"); form_start("$PHP_SELF?func=test_login"); input("text", "name", "user", 20); input("password", "password", "password", 20); form_end(); table_end(); echo "

"; } if ($func == "test_login") { if(empty($user)) { $telerror="No username!"; error_msg("$telerror",""); } if(empty($password)) { $telerror="No password!"; error_msg("$telerror",""); } $user=trim($user); $password=trim($password); $result=mysql_query("select * from admin where user='$user' and password='$password'"); if(empty($result)) { Session_Start(); $_SESSION = array(); session_destroy(); } else { $_SESSION['adminname']=$user; redirect("./index.php"); } } ?> <? include "../include/footer.html"; ?> [/php]