1. 出現“未找到文件“類似的錯誤時候，檢查include文件的位置是否正確，下面引用php手冊頁面的原話：
Files for including are first looked in include_path relative to the current working directory and then in the directory of the current script. E.g. if your include_path is libraries, current working directory is /www/, you included include/a.php and there is include "b.php" in that file, b.php is first looked in /www/libraries/ and then in /www/include/. If filename begins with ./ or ../, it is looked only in include_path relative to the current working directory.
2. 當出現permission deny 類似錯誤的時候，按以下方法排除
a) 檢測被包含的文件讀權限是否打開
b) 檢測被包含的文件路徑上的每個目錄的x權限是否打開，該權限決定了目錄能否被浏覽。
