<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >imagecolorexactalpha</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="Image 图像函数" HREF="ref.image.html"><LINK REL="PREVIOUS" TITLE="imagecolorexact" HREF="function.imagecolorexact.html"><LINK REL="NEXT" TITLE="imagecolormatch" HREF="function.imagecolormatch.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.imagecolorexact.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.imagecolormatch.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.imagecolorexactalpha" ></A >imagecolorexactalpha</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN87328" ></A ><P > (PHP 4 >= 4.0.6, PHP 5)</P >imagecolorexactalpha -- 取得指定的颜色加透明度的索引值</DIV ><DIV CLASS="refsect1" ><A NAME="AEN87331" ></A ><H2 >说明</H2 >int <B CLASS="methodname" >imagecolorexactalpha</B > ( resource image, int red, int green, int blue, int alpha )<BR ></BR ><P > 返回图像调色板中指定颜色加透明度的索引值。 </P ><P > 如果颜色不在图像的调色板中,返回 -1。 returned. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B >本函数需要 GD 2.0.1 或更高版本(推荐 2.0.28 及更高版本)。</P ></BLOCKQUOTE ></DIV ><P > 参见 <A HREF="function.imagecolorclosestalpha.html" ><B CLASS="function" >imagecolorclosestalpha()</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.imagecolorexact.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.imagecolormatch.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >imagecolorexact</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.image.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >imagecolormatch</TD ></TR ></TABLE ></DIV ></BODY ></HTML >