apache_getenv()

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

获取 Apache subprocess_env 变量

说明

apache_getenv(string $variable[,bool $walk_to_top= false]): string

获取$variable指定的环境变量。

此函数需要 Apache 2 否则为 undefined。

参数

$variable

Apache 环境变量

$walk_to_top

是否获取对Apache各层可用的顶层变量

返回值

成功时返回 Apache 环境变量值，失败时返回FALSE

范例

apache_getenv() example

该示例显示如何取得 Apache 环境变量SERVER_ADDR的值。

<?php
$ret = apache_getenv("SERVER_ADDR");
echo $ret;
?>

以上例程的输出类似于：

42.24.42.240

参见

• apache_setenv()设置 Apache 子进程环境变量
• getenv()获取一个环境变量的值
• Superglobals

apache_getenv(key) does not work on an php cgi installation, in this case rather use $_SERVER["REDIRECT_key"]

This manual page is unclear as to whether it will fetch Apache configuration environment variables set by "SetEnv" (including "SetEnvIf[NoCase]" or "BrowserMatch" e.g.) as the only example given is with a pre-defined CGI interface variable (which is also available via the $_SERVER[] array). If custom Apache runtime configuration variables are indeed fetchable via this interface, let's say so or give an example of such.