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>apache_getenv</H1
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><P
>    (PHP 4 &#62;= 4.3.0, PHP 5)</P
>apache_getenv&nbsp;--&nbsp;Get an Apache subprocess_env variable</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN8452"
></A
><H2
>说明</H2
>string <B
CLASS="methodname"
>apache_getenv</B
> ( string variable [, bool walk_to_top] )<BR
></BR
><P
>&#13;   Get an Apache environment variable as specified by 
   <CODE
CLASS="parameter"
>variable</CODE
>.
  </P
><P
>&#13;   This function requires Apache 2 otherwise it's undefined.
  </P
></DIV
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></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>variable</CODE
></DT
><DD
><P
>&#13;       The Apache environment variable
      </P
></DD
><DT
><CODE
CLASS="parameter"
>walk_to_top</CODE
></DT
><DD
><P
>&#13;       Whether to get the top-level variable available to all Apache layers.
      </P
></DD
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>
  </P
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><A
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></A
><H2
>返回值</H2
><P
>&#13;   The value of the Apache environment variable on success, or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on
   failure
  </P
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><H2
>范例</H2
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><B
>例 1. <B
CLASS="function"
>apache_getenv()</B
> example</B
></P
><P
>&#13;     The example above shows how to retrieve the value of the Apache
     environment variable <CODE
CLASS="varname"
>SERVER_ADDR</CODE
>.
    </P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$ret </font><font color="#007700">= </font><font color="#0000BB">apache_getenv</font><font color="#007700">(</font><font color="#DD0000">"SERVER_ADDR"</font><font color="#007700">);<br />echo </font><font color="#0000BB">$ret</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><P
>上例的输出类似于：</P
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>42.24.42.240</PRE
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>
  </P
></DIV
><DIV
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><A
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></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><TD
><A
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><B
CLASS="function"
>apache_setenv()</B
></A
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><A
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><B
CLASS="function"
>getenv()</B
></A
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