<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >phpversion</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="PHP Options&Information" HREF="ref.info.html"><LINK REL="PREVIOUS" TITLE="phpinfo" HREF="function.phpinfo.html"><LINK REL="NEXT" TITLE="putenv" HREF="function.putenv.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.phpinfo.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.putenv.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.phpversion" ></A >phpversion</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN182234" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >phpversion -- Gets the current PHP version</DIV ><DIV CLASS="refsect1" ><A NAME="AEN182237" ></A ><H2 >说明</H2 >string <B CLASS="methodname" >phpversion</B > ( [string extension] )<BR ></BR ><P > Returns a string containing the version of the currently running PHP parser or extension. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182246" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >extension</CODE ></DT ><DD ><P > An optional extension name. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182255" ></A ><H2 >返回值</H2 ><P > If the optional <CODE CLASS="parameter" >extension</CODE > parameter is specified, <B CLASS="function" >phpversion()</B > returns the version of that extension, or <TT CLASS="constant" ><B >FALSE</B ></TT > if there is no version information associated or the extension isn't enabled. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182261" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN182264" ></A ><P ><B >例 1. <B CLASS="function" >phpversion()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#FF8000">// prints e.g. 'Current PHP version: 4.1.1'<br /></font><font color="#007700">echo </font><font color="#DD0000">'Current PHP version: ' </font><font color="#007700">. </font><font color="#0000BB">phpversion</font><font color="#007700">();<br /><br /></font><font color="#FF8000">// prints e.g. '2.0' or nothing if the extension isn't enabled<br /></font><font color="#007700">echo </font><font color="#0000BB">phpversion</font><font color="#007700">(</font><font color="#DD0000">'tidy'</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182268" ></A ><H2 >注释</H2 ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > This information is also available in the predefined constant <TT CLASS="constant" ><B >PHP_VERSION</B ></TT >. </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182273" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.version-compare.html" ><B CLASS="function" >version_compare()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.phpinfo.html" ><B CLASS="function" >phpinfo()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.phpcredits.html" ><B CLASS="function" >phpcredits()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.php-logo-guid.html" ><B CLASS="function" >php_logo_guid()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.zend-version.html" ><B CLASS="function" >zend_version()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.phpinfo.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.putenv.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >phpinfo</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.info.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >putenv</TD ></TR ></TABLE ></DIV ></BODY ></HTML >