Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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><H1
><A
NAME="function.getenv"
></A
>getenv</H1
><DIV
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><A
NAME="AEN181176"
></A
><P
>    (PHP 3, PHP 4, PHP 5)</P
>getenv&nbsp;--&nbsp;Gets the value of an environment variable</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181179"
></A
><H2
>说明</H2
>string <B
CLASS="methodname"
>getenv</B
> ( string varname )<BR
></BR
><P
>&#13;   Gets the value of an environment variable.
  </P
><P
>&#13;   You can see a list of all the environmental variables by using
   <A
HREF="function.phpinfo.html"
><B
CLASS="function"
>phpinfo()</B
></A
>. You can find out what many of them
   mean by taking a look at the <A
HREF="http://hoohoo.ncsa.uiuc.edu/cgi/"
TARGET="_top"
>CGI
   specification</A
>, specifically the <A
HREF="http://hoohoo.ncsa.uiuc.edu/cgi/env.html"
TARGET="_top"
>page on environmental variables</A
>.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181192"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>varname</CODE
></DT
><DD
><P
>&#13;       The variable name.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181201"
></A
><H2
>返回值</H2
><P
>&#13;   Returns the value of the environment variable
   <CODE
CLASS="parameter"
>varname</CODE
>, or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on an error.
  </P
></DIV
><DIV
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><A
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></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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><A
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></A
><P
><B
>例 1. <B
CLASS="function"
>getenv()</B
> Example</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// Example use of getenv()<br /></font><font color="#0000BB">$ip </font><font color="#007700">= </font><font color="#0000BB">getenv</font><font color="#007700">(</font><font color="#DD0000">'REMOTE_ADDR'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Or simply use a Superglobal ($_SERVER or $_ENV)<br /></font><font color="#0000BB">$ip </font><font color="#007700">= </font><font color="#0000BB">$_SERVER</font><font color="#007700">[</font><font color="#DD0000">'REMOTE_ADDR'</font><font color="#007700">];<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></DIV
></TD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181213"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TR
><TD
><A
HREF="function.putenv.html"
><B
CLASS="function"
>putenv()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.apache-getenv.html"
><B
CLASS="function"
>apache_getenv()</B
></A
></TD
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><A
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>Superglobals</A
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