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URL rewriting is a common function of HTTP servers. However, the rules and configuration differ widely between them. Below are some common approaches across a variety of popular web servers available at the time of writing.
All examples that follow use mod_rewrite, an official module that comes bundled with Apache. To use it, mod_rewrite must either be included at compile time or enabled as a Dynamic Shared Object (DSO). Please consult the » Apache documentation for your version for more information.
Here is a very basic virtual host definition. These rules direct all requests to index.php, except when a matching file is found under the document_root.
ServerName my.domain.com DocumentRoot /path/to/server/root/my.domain.com/public RewriteEngine off RewriteEngine On RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ /index.php [NC,L]
Note the slash ("/") prefixing index.php; the rules for .htaccess differ in this regard.
Below is a sample .htaccess file that utilizes mod_rewrite. It is similar to the virtual host configuration, except that it specifies only the rewrite rules, and the leading slash is omitted from index.php.
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteRule ^.*$ index.php [NC,L]
There are many ways to configure mod_rewrite; if you would like more information, see Jayson Minard's » Blueprint for PHP Applications: Bootstrapping.
As of version 7.0, IIS now ships with a standard rewrite engine. You may use the following configuration to create the appropriate rewrite rules.
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