<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >image_type_to_mime_type</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="image_type_to_extension" HREF="function.image-type-to-extension.html"><LINK REL="NEXT" TITLE="image2wbmp" HREF="function.image2wbmp.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.image-type-to-extension.html" ACCESSKEY="P" >上一页</A ></TD ><TD 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color="#000000"> <font color="#0000BB"><?php<br />header</font><font color="#007700">(</font><font color="#DD0000">"Content-type: " </font><font color="#007700">. </font><font color="#0000BB">image_type_to_mime_type</font><font color="#007700">(</font><font color="#0000BB">IMAGETYPE_PNG</font><font color="#007700">));<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > 返回值如下: <DIV CLASS="table" ><A NAME="AEN86764" ></A ><P ><B >表 1. 返回值常量</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><THEAD ><TR ><TH >图像类型(<CODE CLASS="parameter" >imagetype</CODE >)</TH ><TH >返回值</TH ></TR ></THEAD ><TBODY ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_GIF</B ></TT ></TD ><TD ><TT CLASS="literal" >image/gif</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_JPEG</B ></TT ></TD ><TD ><TT CLASS="literal" >image/jpeg</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_PNG</B ></TT ></TD ><TD ><TT CLASS="literal" >image/png</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_SWF</B ></TT ></TD ><TD ><TT CLASS="literal" >application/x-shockwave-flash</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_PSD</B ></TT ></TD ><TD ><TT CLASS="literal" >image/psd</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_BMP</B ></TT ></TD ><TD ><TT CLASS="literal" >image/bmp</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_TIFF_II</B ></TT > (intel byte order)</TD ><TD ><TT CLASS="literal" >image/tiff</TT ></TD ></TR ><TR ><TD > <TT CLASS="constant" ><B >IMAGETYPE_TIFF_MM</B ></TT > (motorola byte order) </TD ><TD ><TT CLASS="literal" >image/tiff</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_JPC</B ></TT ></TD ><TD ><TT CLASS="literal" >application/octet-stream</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_JP2</B ></TT ></TD ><TD ><TT CLASS="literal" >image/jp2</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_JPX</B ></TT ></TD ><TD ><TT CLASS="literal" >application/octet-stream</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_JB2</B ></TT ></TD ><TD ><TT CLASS="literal" >application/octet-stream</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_SWC</B ></TT ></TD ><TD ><TT CLASS="literal" >application/x-shockwave-flash</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_IFF</B ></TT ></TD ><TD ><TT CLASS="literal" >image/iff</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_WBMP</B ></TT ></TD ><TD ><TT CLASS="literal" >image/vnd.wap.wbmp</TT ></TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >IMAGETYPE_XBM</B ></TT ></TD ><TD ><TT CLASS="literal" >image/xbm</TT ></TD ></TR ></TBODY ></TABLE ></DIV > </P ><P > <DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > 本函数不需要 GD 库。 </P ></BLOCKQUOTE ></DIV > </P ><P > 参见 <A HREF="function.getimagesize.html" ><B CLASS="function" >getimagesize()</B ></A >,<A HREF="function.exif-imagetype.html" ><B CLASS="function" >exif_imagetype()</B ></A >,<A HREF="function.exif-read-data.html" ><B CLASS="function" >exif_read_data()</B ></A > 和 <A HREF="function.exif-thumbnail.html" ><B CLASS="function" >exif_thumbnail()</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.image-type-to-extension.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.image2wbmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >image_type_to_extension</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" >image2wbmp</TD 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