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Professional LAMP Linux Apache, MySQL and PHP5 Web Development phần 5

Mỗi bốn bảng truy cập chính tương ứng với bốn cấp độ truy cập khác nhau. Ở cấp độ toàn cầu, có bảng người sử dụng, có cấu trúc trông như thế này: trường máy chủ mật khẩu người dùng Bây giờ, nếu kịch bản được gọi với ACCESS_LEVEL thêm vào, nó không quan trọng nếu người dùng thực sự là một quản trị viên hay không | Chapter 6 noescape NE When mod_rewrite performs its transformations it goes to great lengths to make sure special characters in the rewritten URL are escaped before performing any internal or external redirection. For example RewriteRule Asomedir index.php page foo 3b R Given this rule Apache would redirect the somedir directory as requested and the _GET value for page will be a safe escaped value of foo 3b mod_rewrite has escaped the 3b value instead of replacing it with its semicolon substitute. To tell mod_rewrite to avoid any automatic escaping you use the noescape flag RewriteRule Asomedir index.php page foo 3b R NE Given this rule the new value of the page query-string parameter will be foo . passthrough PT Use the passthrough flag when you want to combine mod_rewrite with other Apache modules that provide similar URL-handling functionality such as mod_alias. For example if you wanted to rewrite foo to point to bar and then use mod_alias to translate bar to baz you might try the following RewriteRule A foo bar Alias bar baz Unfortunately because of the way Apache handles URIs internally it would not work as written. To make it work add the passthrough flag RewriteRule A foo bar PT Alias bar baz A general rule of thumb is to use passthrough if you are using more than one URL translating module to process a file. nosubreq NS Use the nosubreq flag to force the rewrite engine to skip a rule if the request is actually an internal subrequest. When using PHP and Apache together there are seldom situations when this flag is actually needed. There are however some CGI scripting instances where this flag comes into play. For more information see the Apache manual section on RewriteRule http httpd.apache.org docs-2.0 mod mod_rewrite.html rewriterule. proxy P The proxy flag tells the rewrite engine to stop processing the rule-set immediately and force the request through the Apache proxy module mod_proxy. With all this attention being given to RewriteRule you might think