<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >htmlspecialchars</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="htmlspecialchars_decode" HREF="function.htmlspecialchars-decode.html"><LINK REL="NEXT" TITLE="implode" HREF="function.implode.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.htmlspecialchars-decode.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.implode.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.htmlspecialchars" ></A >htmlspecialchars</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN225442" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >htmlspecialchars -- Convert special characters to HTML entities </DIV ><DIV CLASS="refsect1" ><A NAME="AEN225445" ></A ><H2 >Description</H2 >string <B CLASS="methodname" >htmlspecialchars</B > ( string string [, int quote_style [, string charset]] )<BR ></BR ><P > Certain characters have special significance in HTML, and should be represented by HTML entities if they are to preserve their meanings. This function returns a string with some of these conversions made; the translations made are those most useful for everyday web programming. If you require all HTML character entities to be translated, use <A HREF="function.htmlentities.html" ><B CLASS="function" >htmlentities()</B ></A > instead. </P ><P > This function is useful in preventing user-supplied text from containing HTML markup, such as in a message board or guest book application. The optional second argument, <CODE CLASS="parameter" >quote_style</CODE >, tells the function what to do with single and double quote characters. The default mode, <TT CLASS="constant" ><B >ENT_COMPAT</B ></TT >, is the backwards compatible mode which only translates the double-quote character and leaves the single-quote untranslated. If <TT CLASS="constant" ><B >ENT_QUOTES</B ></TT > is set, both single and double quotes are translated and if <TT CLASS="constant" ><B >ENT_NOQUOTES</B ></TT > is set neither single nor double quotes are translated. </P ><P > The translations performed are: <P ></P ><UL ><LI ><P > '&' (ampersand) becomes '&amp;' </P ></LI ><LI ><P > '"' (double quote) becomes '&quot;' when <TT CLASS="constant" ><B >ENT_NOQUOTES</B ></TT > is not set. </P ></LI ><LI ><P > ''' (single quote) becomes '&#039;' only when <TT CLASS="constant" ><B >ENT_QUOTES</B ></TT > is set. </P ></LI ><LI ><P > '<' (less than) becomes '&lt;' </P ></LI ><LI ><P > '>' (greater than) becomes '&gt;' </P ></LI ></UL > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN225480" ></A ><P ><B >例 1. <B CLASS="function" >htmlspecialchars()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$new </font><font color="#007700">= </font><font color="#0000BB">htmlspecialchars</font><font color="#007700">(</font><font color="#DD0000">"<a href='test'>Test</a>"</font><font color="#007700">, </font><font color="#0000BB">ENT_QUOTES</font><font color="#007700">);<br />echo </font><font color="#0000BB">$new</font><font color="#007700">; </font><font color="#FF8000">// &lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > Note that this function does not translate anything beyond what is listed above. For full entity translation, see <A HREF="function.htmlentities.html" ><B CLASS="function" >htmlentities()</B ></A >. Support for the optional second argument was added in PHP 3.0.17 and PHP 4.0.3. </P ><P > The third argument <CODE CLASS="parameter" >charset</CODE > defines character set used in conversion. The default character set is ISO-8859-1. Support for this third argument was added in PHP 4.1.0. </P ><P > PHP 4.3.0 及其后续版本支持如下字符集。 <DIV CLASS="table" ><A NAME="AEN225489" ></A ><P ><B >表 1. 已支持字符集</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><COL><THEAD ><TR ><TH >字符集</TH ><TH >别名</TH ><TH >描述</TH ></TR ></THEAD ><TBODY ><TR ><TD >ISO-8859-1</TD ><TD >ISO8859-1</TD ><TD > 西欧,Latin-1 </TD ></TR ><TR ><TD >ISO-8859-15</TD ><TD >ISO8859-15</TD ><TD > 西欧,Latin-9。增加了 Latin-1(ISO-8859-1)中缺少的欧元符号、法国及芬兰字母。 </TD ></TR ><TR ><TD >UTF-8</TD ><TD > </TD ><TD > ASCII 兼容多字节 8-bit Unicode。 </TD ></TR ><TR ><TD >cp866</TD ><TD >ibm866, 866</TD ><TD > DOS-特有的 Cyrillic 字母字符集。PHP 4.3.2 开始支持该字符集。 </TD ></TR ><TR ><TD >cp1251</TD ><TD >Windows-1251, win-1251, 1251</TD ><TD > Windows-特有的 Cyrillic 字母字符集。PHP 4.3.2 开始支持该字符集。 </TD ></TR ><TR ><TD >cp1252</TD ><TD >Windows-1252, 1252</TD ><TD > Windows 对于西欧特有的字符集。 </TD ></TR ><TR ><TD >KOI8-R</TD ><TD >koi8-ru, koi8r</TD ><TD > 俄文。PHP 4.3.2 开始支持该字符集。 </TD ></TR ><TR ><TD >BIG5</TD ><TD >950</TD ><TD > 繁体中文,主要用于中国台湾。 </TD ></TR ><TR ><TD >GB2312</TD ><TD >936</TD ><TD > 简体中文,国际标准字符集。 </TD ></TR ><TR ><TD >BIG5-HKSCS</TD ><TD > </TD ><TD > 繁体中文,Big5 的延伸,主要用于香港。 </TD ></TR ><TR ><TD >Shift_JIS</TD ><TD >SJIS, 932</TD ><TD > 日文。 </TD ></TR ><TR ><TD >EUC-JP</TD ><TD >EUCJP</TD ><TD > 日文。 </TD ></TR ></TBODY ></TABLE ></DIV > <DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > ISO-8859-1 将代替任何其它无法识别的字符集。 </P ></BLOCKQUOTE ></DIV > </P ><P > See also <A HREF="function.get-html-translation-table.html" ><B CLASS="function" >get_html_translation_table()</B ></A >, <A HREF="function.htmlspecialchars-decode.html" ><B CLASS="function" >htmlspecialchars_decode()</B ></A >, <A HREF="function.strip-tags.html" ><B CLASS="function" >strip_tags()</B ></A >, <A HREF="function.htmlentities.html" ><B CLASS="function" >htmlentities()</B ></A >, and <A HREF="function.nl2br.html" ><B CLASS="function" >nl2br()</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.htmlspecialchars-decode.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.implode.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >htmlspecialchars_decode</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" >implode</TD ></TR ></TABLE ></DIV ></BODY ></HTML >