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
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NAME="function.extension-loaded"
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>extension_loaded</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN180725"
></A
><P
>    (PHP 3 &#62;= 3.0.10, PHP 4, PHP 5)</P
>extension_loaded&nbsp;--&nbsp;Find out whether an extension is loaded</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180728"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>extension_loaded</B
> ( string name )<BR
></BR
><P
>&#13;   Finds out whether the extension is loaded.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180737"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>name</CODE
></DT
><DD
><P
>&#13;       The extension name.
      </P
><P
>&#13;       You can see the names of various extensions by using
       <A
HREF="function.phpinfo.html"
><B
CLASS="function"
>phpinfo()</B
></A
> or if you're using the
       <TT
CLASS="literal"
>CGI</TT
> or <TT
CLASS="literal"
>CLI</TT
> version of
       PHP you can use the <CODE
CLASS="option"
>-m</CODE
> switch to
       list all available extensions:
       <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>$ php -m
[PHP Modules]
xml
tokenizer
standard
sockets
session
posix
pcre
overload
mysql
mbstring
ctype

[Zend Modules]</PRE
></TD
></TR
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>
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180752"
></A
><H2
>返回值</H2
><P
>&#13;   Returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the extension identified by <CODE
CLASS="parameter"
>name</CODE
>
   is loaded, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> otherwise.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180758"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN180761"
></A
><P
><B
>例 1. <B
CLASS="function"
>extension_loaded()</B
> example</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#007700">if (!</font><font color="#0000BB">extension_loaded</font><font color="#007700">(</font><font color="#DD0000">'gd'</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;if (!</font><font color="#0000BB">dl</font><font color="#007700">(</font><font color="#DD0000">'gd.so'</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;exit;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />}<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180765"
></A
><H2
>注释</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    <B
CLASS="function"
>extension_loaded()</B
> uses the internal extension name
    to test whether a certain extension is available or not. Most internal
    extension names are written in lower case but there may be extension
    available which also use uppercase letters. Be warned that this
    function compares <SPAN
CLASS="strong"
><B
CLASS="emphasis"
>case sensitive</B
></SPAN
> !
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180771"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TR
><TD
><A
HREF="function.get-loaded-extensions.html"
><B
CLASS="function"
>get_loaded_extensions()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.get-extension-funcs.html"
><B
CLASS="function"
>get_extension_funcs()</B
></A
></TD
></TR
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><TD
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>phpinfo()</B
></A
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>dl()</B
></A
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