mod-rewrite Directives provided by mod-rewrite in Apache 2.4 RewriteMap

Example

The directive defines a function which'll lookup a key in the defined map and substitutes the lookup with its replacement from the map.

The mapping function is defined with the RewriteMap directive itself as follows:

RewriteMap MAPNAME Type:Source

and can be referenced in any of the RewriteCond or RewriteRule directives to act as a substitution guide as follows:

${ MAPNAME : KEY | DEFAULT }

The following are valid values for Type in the map definition:

1. int - allows toupper, tolower, escape and unescape only
2. txt - searches a text file
3. dbd - looks up in a database using SQL SELECT statement
4. rnd - random lookups from text file
5. dbm - similar to txt, except that the httxt2dbm needs to convert the data to hashes
6. fastdbd - looks up in a database using SQL SELECT statement with caching