Apache Module mod_version
| Description: | Version dependent configuration |
|---|---|
| Status: | Extension |
| ModuleIdentifier: | version_module |
| SourceFile: | 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.
<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 >= 2.3>
# 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:
| operator | description |
|---|---|
= 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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