OHaHa's學習心得

function.session

session_start() 或是 header() 前面不能有任何資料.
常見原因是utf-8存檔 編輯器自己加上了BOM資料,造成apache誤判.

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent

同樣的, session_register() , 建議使用以下方式

Warning: session_register() [function.session-register]: Cannot send session cache limiter - headers already sent

// 不建議使用
$login = "ok";
session_register("login");

// 建議改採用
$_SESSION["login"] = "ok";

可能同時出現的警告訊息: (表示您使用 register_globals 參數)

Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0

若要取消,可以修改 /usr/local/etc/php.ini

session.bug_compat_42 = 0
session.bug_compat_warn = 0

Unexpected soft update inconsistency

開機出現訊息:

UNEXPECTED SOFT UPDATE INCONSISTENCY ; RUN fsck MANUALLY ;

狀況:
當不當關機,或是硬體故障,系統就無法保證寫回的資料正確無誤.
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panic: ufs_dirbad: bad dir

系統錯誤訊息: ufs_dirbad: bad dir  , 重新開機.

狀況: 可能讀取到錯誤的資料夾位址,為了保護系統,所以自動重新開機.
       常起因於不當關機.

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