PHP Manual
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# apache_getenv

(PHP 4 >= 4.3.0, PHP 5)

apache_getenv -- Get an Apache subprocess_env variable

## 说明

string apache_getenv ( string variable [, bool walk_to_top] )

Get an Apache environment variable as specified by variable.

This function requires Apache 2 otherwise it's undefined.

## 参数

variable

  The Apache environment variable

walk_to_top

  The walk_to_top parameter.

## 返回值

The value of the Apache environment variable on success, or `FALSE` on failure

## 例

例子 1. apache_getenv() example The example above shows how to retrieve the value of the Apache environment variable SERVER_ADDR.
`<?php $ret = apache_getenv("SERVER_ADDR"); echo $ret; ?>`
上例的输出类似于：
    42.24.42.240

## 参见

apache_sentenv()
getenv()
Superglobals

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