<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >strtr</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="String 字符串处理函数" HREF="ref.strings.html"><LINK REL="PREVIOUS" TITLE="strtoupper" HREF="function.strtoupper.html"><LINK REL="NEXT" TITLE="substr_compare" HREF="function.substr-compare.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.strtoupper.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.substr-compare.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.strtr" ></A >strtr</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN228353" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >strtr -- Translate certain characters</DIV ><DIV CLASS="refsect1" ><A NAME="AEN228356" ></A ><H2 >Description</H2 >string <B CLASS="methodname" >strtr</B > ( string str, string from, string to )<BR ></BR >string <B CLASS="methodname" >strtr</B > ( string str, array replace_pairs )<BR ></BR ><P > This function returns a copy of <CODE CLASS="parameter" >str</CODE >, translating all occurrences of each character in <CODE CLASS="parameter" >from</CODE > to the corresponding character in <CODE CLASS="parameter" >to</CODE >. </P ><P > If <CODE CLASS="parameter" >from</CODE > and <CODE CLASS="parameter" >to</CODE > are different lengths, the extra characters in the longer of the two are ignored. <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN228386" ></A ><P ><B >例 1. <B CLASS="function" >strtr()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$addr </font><font color="#007700">= </font><font color="#0000BB">strtr</font><font color="#007700">(</font><font color="#0000BB">$addr</font><font color="#007700">, </font><font color="#DD0000">"äåö"</font><font color="#007700">, </font><font color="#DD0000">"aao"</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > <B CLASS="function" >strtr()</B > may be called with only two arguments. If called with two arguments it behaves in a new way: <CODE CLASS="parameter" >from</CODE > then has to be an array that contains string -> string pairs that will be replaced in the source string. <B CLASS="function" >strtr()</B > will always look for the longest possible match first and will *NOT* try to replace stuff that it has already worked on. </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN228394" ></A ><P ><B >例 2. <B CLASS="function" >strtr()</B > example with two arguments</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$trans </font><font color="#007700">= array(</font><font color="#DD0000">"hello" </font><font color="#007700">=> </font><font color="#DD0000">"hi"</font><font color="#007700">, </font><font color="#DD0000">"hi" </font><font color="#007700">=> </font><font color="#DD0000">"hello"</font><font color="#007700">);<br />echo </font><font color="#0000BB">strtr</font><font color="#007700">(</font><font color="#DD0000">"hi all, I said hello"</font><font color="#007700">, </font><font color="#0000BB">$trans</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > This will show: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >hello all, I said hi</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > This optional <CODE CLASS="parameter" >to</CODE > and <CODE CLASS="parameter" >from</CODE > parameters were added in PHP 4.0.0 </P ></BLOCKQUOTE ></DIV ><P > See also <A HREF="function.ereg-replace.html" ><B CLASS="function" >ereg_replace()</B ></A >. </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.strtoupper.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.substr-compare.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >strtoupper</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.strings.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >substr_compare</TD ></TR ></TABLE ></DIV ></BODY ></HTML >