<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >imagepng</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="imagepalettecopy" HREF="function.imagepalettecopy.html"><LINK REL="NEXT" TITLE="imagepolygon" HREF="function.imagepolygon.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.imagepalettecopy.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.imagepolygon.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.imagepng" ></A >imagepng</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN89102" ></A ><P > (PHP 3 >= 3.0.13, PHP 4, PHP 5)</P >imagepng -- 以 PNG 格式将图像输出到浏览器或文件</DIV ><DIV CLASS="refsect1" ><A NAME="AEN89105" ></A ><H2 >说明</H2 >bool <B CLASS="methodname" >imagepng</B > ( resource image [, string filename] )<BR ></BR ><P > <B CLASS="function" >imagepng()</B > 将 GD 图像流(<CODE CLASS="parameter" >image</CODE >)以 PNG 格式输出到标准输出(通常为浏览器),或者如果用 <CODE CLASS="parameter" >filename</CODE > 给出了文件名则将其输出到该文件。 <DIV CLASS="informalexample" ><P ></P ><A NAME="AEN89120" ></A ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$im </font><font color="#007700">= </font><font color="#0000BB">imagecreatefrompng</font><font color="#007700">(</font><font color="#DD0000">"test.png"</font><font color="#007700">);<br /></font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P ></P ></DIV > </P ><P > 参见 <A HREF="function.imagegif.html" ><B CLASS="function" >imagegif()</B ></A >,<A HREF="function.imagewbmp.html" ><B CLASS="function" >imagewbmp()</B ></A >,<A HREF="function.imagejpeg.html" ><B CLASS="function" >imagejpeg()</B ></A > 和 <A HREF="function.imagetypes.html" ><B CLASS="function" >imagetypes()</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.imagepalettecopy.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.imagepolygon.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >imagepalettecopy</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" >imagepolygon</TD ></TR ></TABLE ></DIV ></BODY ></HTML >