<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >imagepolygon</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="imagepng" HREF="function.imagepng.html"><LINK REL="NEXT" TITLE="imagepsbbox" HREF="function.imagepsbbox.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.imagepng.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.imagepsbbox.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.imagepolygon" ></A >imagepolygon</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN89128" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >imagepolygon -- 画一个多边形</DIV ><DIV CLASS="refsect1" ><A NAME="AEN89131" ></A ><H2 >说明</H2 >bool <B CLASS="methodname" >imagepolygon</B > ( resource image, array points, int num_points, int color )<BR ></BR ><P > <B CLASS="function" >imagepolygon()</B > 在图像中创建一个多边形。<CODE CLASS="parameter" >points</CODE > 是一个 PHP 数组，包含了多边形的各个顶点坐标，即 points[0] = x0，points[1] = y0，points[2] = x1，points[3] = y1，以此类推。<CODE CLASS="parameter" >num_points</CODE > 是顶点的总数。 </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN89153" ></A ><P ><B >例 1. <B CLASS="function" >imagepolygon()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#FF8000">// create a blank image<br /></font><font color="#0000BB">$image </font><font color="#007700">= </font><font color="#0000BB">imagecreatetruecolor</font><font color="#007700">(</font><font color="#0000BB">400</font><font color="#007700">, </font><font color="#0000BB">300</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// fill the background color<br /></font><font color="#0000BB">$bg </font><font color="#007700">= </font><font color="#0000BB">imagecolorallocate</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// choose a color for the polygon<br /></font><font color="#0000BB">$col_poly </font><font color="#007700">= </font><font color="#0000BB">imagecolorallocate</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">255</font><font color="#007700">, </font><font color="#0000BB">255</font><font color="#007700">, </font><font color="#0000BB">255</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// draw the polygon<br /></font><font color="#0000BB">imagepolygon</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">,<br /> array (<br /> </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">,<br /> </font><font color="#0000BB">100</font><font color="#007700">, </font><font color="#0000BB">200</font><font color="#007700">,<br /> </font><font color="#0000BB">300</font><font color="#007700">, </font><font color="#0000BB">200<br /> </font><font color="#007700">),<br /> </font><font color="#0000BB">3</font><font color="#007700">,<br /> </font><font color="#0000BB">$col_poly</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// output the picture<br /></font><font color="#0000BB">header</font><font color="#007700">(</font><font color="#DD0000">"Content-type: image/png"</font><font color="#007700">);<br /></font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > 参见 <A HREF="function.imagecreate.html" ><B CLASS="function" >imagecreate()</B ></A > 和 <A HREF="function.imagecreatetruecolor.html" ><B CLASS="function" >imagecreatetruecolor()</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.imagepng.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.imagepsbbox.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >imagepng</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" >imagepsbbox</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
