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This document provides an introduction to mod_rewrite, which allows URL matching and transformation in Apache. It outlines key concepts like RewriteRule, RewriteCond, and RewriteFlags. Regular expressions basics are covered, like wildcards and character classes. Examples show URL beautification and conditional rewrites. RewriteMap is described for more complex rewrites using external programs or files. Caveats of mod_rewrite in .htaccess files are noted, such as relative paths and inability to enable RewriteLog.



































































