Format My Source Code for Blogging

轉程式碼

session失效

js中使用window.location.href來指定頁面的跳轉，會被認為是一個新的html請求，因此會清空session

window.location與document.URL的不同是一個取得物件一個取得唯獨的字串
解決辦法
From what I remember, the only way to do it would be by doing something like

window.location.href='page.php?<?php echo session_name().'='.session_id();?>' 

$_FILES Error Messages Explained

UPLOAD_ERR_OK

Value: 0; There is no error, the file uploaded with success.

UPLOAD_ERR_INI_SIZE

Value: 1; The uploaded file exceeds the upload_max_filesize directive in php.ini.

UPLOAD_ERR_FORM_SIZE

Value: 2; The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.

UPLOAD_ERR_PARTIAL

Value: 3; The uploaded file was only partially uploaded.

UPLOAD_ERR_NO_FILE

Value: 4; No file was uploaded.

UPLOAD_ERR_NO_TMP_DIR

Value: 6; Missing a temporary folder. Introduced in PHP 4.3.10 and PHP 5.0.3.

UPLOAD_ERR_CANT_WRITE

Value: 7; Failed to write file to disk. Introduced in PHP 5.1.0.