mod_version

概述

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.

例子

<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> 指令

<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或2.2. minor和patch are optional. If these numbers are omitted, they are assumed to be zero. The following numerical operators are possible:

示例

<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:

示例

<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 =.