Apache HTTP Server Version 2.2
Apache Module mod_version
| Description: | Version dependent configuration |
|---|---|
| Status: | Extension |
| Module Identifier: | version_module |
| Source File: | mod_version.c |
| Compatibility: | Available in version 2.0.56 and later |
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 2.1.0>
# current httpd version is exactly 2.1.0
</IfVersion>
<IfVersion >= 2.2>
# use really new features :-)
</IfVersion>
See below for further possibilities.
<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:
| operator | description |
|---|---|
= 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 >= 2.1>
# this happens only in versions greater or
# equal 2.1.0.
</IfVersion>
Besides the numerical comparison it is possible to match a regular expression against the httpd version. There are two ways to write it:
| operator | description |
|---|---|
= or == |
version has the form
/regex/ |
~ |
version has the form
regex |
Example
<IfVersion = /^2.1.[01234]$/>
# e.g. workaround for buggy versions
</IfVersion>
In order to reverse the meaning, all operators can be preceded by an
exclamation mark (!):
<IfVersion !~ ^2.1.[01234]$>
# not for those versions
</IfVersion>
If the operator is omitted, it is assumed to be
=.