Apache模块 mod_version

说明	提供基于版本的配置段支持
状态	扩展(E)
模块名	version_module
源文件	mod_version.c
兼容性	仅在 Apache 2.0.56 及以后的版本中可用

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

说明	contains version dependent configuration
语法	`<IfVersion [[!]operator] version> ... </IfVersion>`
作用域	server config, virtual host, directory, .htaccess
覆盖项	All
状态	扩展(E)
模块	mod_version

<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:

`operator`	description
`=`或`==`	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

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:

`operator`	description
`=`或`==`	`version` has the form `/regex/`
`~`	`version` has the form `regex`

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 =.