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Apache Module mod_version

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Description:Version dependent configuration
Status:Extension
Module Identifier:version_module
Source File:mod_version.c

Summary

This module is designed for the use in test suites and large networks which have to deal with different httpd versions and different configurations. It provides a new container -- <IfVersion>, which allows a flexible version checking including numeric comparisons and regular expressions.

Examples

<IfVersion 2.4.2>
    # current httpd version is exactly 2.4.2
</IfVersion>

<IfVersion >= 2.5>
    # use really new features :-)
</IfVersion>

See below for further possibilities.

Directives

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<IfVersion> Directive

Description:contains version dependent configuration
Syntax:<IfVersion [[!]operator] version> ... </IfVersion>
Context:server config, virtual host, directory, .htaccess
Override:All
Status:Extension
Module:mod_version

The <IfVersion> section encloses configuration directives which are executed only if the httpd version matches the desired criteria. For normal (numeric) comparisons the version argument has the format major[.minor[.patch]], e.g. 2.1.0 or 2.2. minor and patch are optional. If these numbers are omitted, they are assumed to be zero. The following numerical operators are possible:

operatordescription
= or == httpd version is equal
> httpd version is greater than
>= httpd version is greater or equal
< httpd version is less than
<= httpd version is less or equal

Example

<IfVersion >= 2.3>
    # this happens only in versions greater or
    # equal 2.3.0.
</IfVersion>

Besides the numerical comparison it is possible to match a regular expression against the httpd version. There are two ways to write it:

operatordescription
= or == version has the form /regex/
~ version has the form regex

Example

<IfVersion = /^2.4.[01234]$/>
    # e.g. workaround for buggy versions
</IfVersion>

In order to reverse the meaning, all operators can be preceded by an exclamation mark (!):

<IfVersion !~ ^2.4.[01234]$>
    # not for those versions
</IfVersion>

If the operator is omitted, it is assumed to be =.

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