<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >imagetypes</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="imagettftext" HREF="function.imagettftext.html"><LINK REL="NEXT" TITLE="imagewbmp" HREF="function.imagewbmp.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.imagettftext.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.imagewbmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.imagetypes" ></A >imagetypes</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN89989" ></A ><P > (PHP 3 CVS only, PHP 4 >= 4.0.2, PHP 5)</P >imagetypes -- 返回当前 PHP 版本所支持的图像类型</DIV ><DIV CLASS="refsect1" ><A NAME="AEN89992" ></A ><H2 >说明</H2 >int <B CLASS="methodname" >imagetypes</B > ( void )<BR ></BR ><P > 本函数以比特字段方式返回与当前 PHP 版本关联的 GD 库所支持的图像格式。将返回以下结果,<TT CLASS="constant" ><B >IMG_GIF</B ></TT > | <TT CLASS="constant" ><B >IMG_JPG</B ></TT > | <TT CLASS="constant" ><B >IMG_PNG</B ></TT > | <TT CLASS="constant" ><B >IMG_WBMP</B ></TT >| <TT CLASS="constant" ><B >IMG_XPM</B ></TT >。 例如要检查是否支持 PNG,这样做: <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN90004" ></A ><P ><B >例 1. <B CLASS="function" >imagetypes()</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="#007700">if (</font><font color="#0000BB">imagetypes</font><font color="#007700">() & </font><font color="#0000BB">IMG_PNG</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"PNG Support is enabled"</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </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.imagettftext.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.imagewbmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >imagettftext</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" >imagewbmp</TD ></TR ></TABLE ></DIV ></BODY ></HTML >