<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >call_user_func</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="Function Handling Functions" HREF="ref.funchand.html"><LINK REL="PREVIOUS" TITLE="call_user_func_array" HREF="function.call-user-func-array.html"><LINK REL="NEXT" TITLE="create_function" HREF="function.create-function.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.call-user-func-array.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.create-function.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.call-user-func" ></A >call_user_func</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN62637" ></A ><P > (PHP 3 >= 3.0.3, PHP 4, PHP 5)</P >call_user_func -- Call a user function given by the first parameter</DIV ><DIV CLASS="refsect1" ><A NAME="AEN62640" ></A ><H2 >说明</H2 >mixed <B CLASS="methodname" >call_user_func</B > ( callback function [, mixed parameter [, mixed ...]] )<BR ></BR ><P > Call a user defined function given by the <CODE CLASS="parameter" >function</CODE > parameter. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN62656" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >function</CODE ></DT ><DD ><P > The function to be called. Class methods may also be invoked statically using this function by passing <TT CLASS="literal" >array($classname, $methodname)</TT > to this parameter. </P ></DD ><DT ><CODE CLASS="parameter" >parameter</CODE ></DT ><DD ><P > Zero or more parameters to be passed to the function. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > Note that the parameters for <B CLASS="function" >call_user_func()</B > are not passed by reference. <DIV CLASS="informalexample" ><P ></P ><A NAME="AEN62674" ></A ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#007700">function </font><font color="#0000BB">increment</font><font color="#007700">(&</font><font color="#0000BB">$var</font><font color="#007700">)<br />{<br /> </font><font color="#0000BB">$var</font><font color="#007700">++;<br />}<br /><br /></font><font color="#0000BB">$a </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">;<br /></font><font color="#0000BB">call_user_func</font><font color="#007700">(</font><font color="#DD0000">'increment'</font><font color="#007700">, </font><font color="#0000BB">$a</font><font color="#007700">);<br />echo </font><font color="#0000BB">$a</font><font color="#007700">; </font><font color="#FF8000">// 0<br /><br /></font><font color="#0000BB">call_user_func_array</font><font color="#007700">(</font><font color="#DD0000">'increment'</font><font color="#007700">, array(&</font><font color="#0000BB">$a</font><font color="#007700">)); </font><font color="#FF8000">// You can use this instead<br /></font><font color="#007700">echo </font><font color="#0000BB">$a</font><font color="#007700">; </font><font color="#FF8000">// 1<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P ></P ></DIV > </P ></BLOCKQUOTE ></DIV ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN62676" ></A ><H2 >返回值</H2 ><P > Returns the function result, or <TT CLASS="constant" ><B >FALSE</B ></TT > on error. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN62680" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN62683" ></A ><P ><B >例 1. <B CLASS="function" >call_user_func()</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="#007700">function </font><font color="#0000BB">barber</font><font color="#007700">(</font><font color="#0000BB">$type</font><font color="#007700">)<br />{<br /> echo </font><font color="#DD0000">"You wanted a $type haircut, no problem"</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">call_user_func</font><font color="#007700">(</font><font color="#DD0000">'barber'</font><font color="#007700">, </font><font color="#DD0000">"mushroom"</font><font color="#007700">);<br /></font><font color="#0000BB">call_user_func</font><font color="#007700">(</font><font color="#DD0000">'barber'</font><font color="#007700">, </font><font color="#DD0000">"shave"</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN62687" ></A ><P ><B >例 2. Using a class method</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#007700">class </font><font color="#0000BB">myclass </font><font color="#007700">{<br /> function </font><font color="#0000BB">say_hello</font><font color="#007700">()<br /> {<br /> echo </font><font color="#DD0000">"Hello!\n"</font><font color="#007700">;<br /> }<br />}<br /><br /></font><font color="#0000BB">$classname </font><font color="#007700">= </font><font color="#DD0000">"myclass"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">call_user_func</font><font color="#007700">(array(</font><font color="#0000BB">$classname</font><font color="#007700">, </font><font color="#DD0000">'say_hello'</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="AEN62690" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.call-user-func-array.html" ><B CLASS="function" >call_user_func_array()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.is-callable.html" ><B CLASS="function" >is_callable()</B ></A ></TD ></TR ><TR ><TD >有关 <A HREF="language.pseudo-types.html#language.types.callback" >callback</A > 类型的信息</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.call-user-func-array.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.create-function.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >call_user_func_array</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.funchand.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >create_function</TD ></TR ></TABLE ></DIV ></BODY ></HTML >