This article will lead you through rewrite rules, regular expressions, and rewrite conditions, and provide a great list of examples. The city is selected via the URI like this: In order for the display. A very common approach is to use the expression.
We add flags at the end of a condition or rule using square brackets, and separate multiple flags with a comma. By default, this means that Apache will issue an HTTP response to indicate that the document has been moved temporarily, but you can specify the HTTP code if you like.
You can also define a new query sting to which the old string will be appended, just be careful not to replicate key names. Failure to use the QSA flag will cause the creation of a query string during a redirection to destroy an existing query string. As a result, Apache will issue a HTTP response, which can be used to protect files from being viewed by unauthorized visitors, bandwidth leeches, and so on.
You can read about the other available flags at Apache. As a good programmer, you know how important comments are in your code.
Be sure to put some careful consideration into the creation of your new URI scheme. When you design your new URI scheme, make use of unique keys whenever you can.
In a previous example, I used countries, states and cities as keys — items that would be unique in a database.
Articles in the database are typically identified by an auto-incremented ID, which would be perfect for my friendly URI scheme. It makes your rewrite rules a lot simpler because you can map a URI atom to a query string value directly. People often attempt to use a database to redirect from a title or other such field to a specific ID value.
Instead, avoid the problem completely, and use the ID field to create your links.
However, when working with unique database field values that contain spaces, I prefer to use the underscore character to replace the spaces in resulting links.
To do so, you can use the following PHP code: Preventing image hotlinking If some unscrupulous webmasters are leeching your bandwidth by linking to images from your site to post on theirs, you can use the following rule to block the requests: What appears in this image is completely up to your imagination!
You can block specific domains using: This script checks to see that the requested filename is not an existing filename or directory name before it redirects to the You can extend this script: Creating extensionless links If your site uses PHP files, and you want to make your links easier to remember — or you just want to hide the file extension, try this:Apache Group `` Despite the tons of examples and docs, mod_rewrite is voodoo.
Damned cool voodoo, but still voodoo. A hook for each of these phases is provided by the Apache API. Mod_rewrite uses two of these hooks: the URL For example, use it to rewrite the root-path URL ('/') to a real one, e.g.
mod_rewrite uses "flags" to give our rewrite conditions and rules additional features. We add flags at the end of a condition or rule using square brackets, and separate multiple flags with a.
Apache usually comes with the URL rewriting module, mod_rewrite, already installed. The set-up is very common and is the basis for all of the examples in this article.
The set-up is very common and is the basis for all of the examples in this article. Creating Rewrite Rules for the URL Rewrite Module. 03/28/; 6 minutes to read Contributors. In this article.
by Ruslan Yakushev. The URL rewrite module is an extension to IIS which is available as a download for your stand-alone IIS Server, and is also pre-installed on any website on Windows Azure Web Sites (WAWS) and available for your mtb15.com walkthrough will guide you through how to.
Apache Group `` Despite the tons of examples and docs, mod_rewrite is voodoo. Damned cool voodoo, but still voodoo. A hook for each of these phases is provided by the Apache API. Mod_rewrite uses two of these hooks: the Unbelievably mod_rewrite provides URL manipulations in .
When RewriteRule is used in VirtualHost or server context with version or later of httpd, mod_rewrite will only process the rewrite rules if the request URI is a URL-path. This avoids some security issues where particular rules could allow "surprising" pattern expansions (see CVE and CVE).