<HTML ><HEAD ><TITLE >exif_imagetype</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Image functions" HREF="ref.image.html"><LINK REL="PREVIOUS" TITLE="Image functions" HREF="ref.image.html"><LINK REL="NEXT" TITLE="exif_read_data" HREF="function.exif-read-data.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></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 Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="ref.image.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.exif-read-data.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.exif-imagetype" ></A >exif_imagetype</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN33906" ></A ><P > (PHP 4 >= 4.3.0)</P >exif_imagetype -- Determine the type of an image</DIV ><DIV CLASS="refsect1" ><A NAME="AEN33909" ></A ><H2 >Description</H2 >int|false <B CLASS="methodname" >exif_imagetype</B > ( string filename)<BR ></BR ><P > <B CLASS="function" >exif_imagetype()</B > reads the first bytes of an image and checks its signature. When a correct signature is found a constant will be returned otherwise the return value is <TT CLASS="constant" ><B >FALSE</B ></TT >. The return value is the same value that <A HREF="function.getimagesize.html" ><B CLASS="function" >getimagesize()</B ></A > returns in index 2 but this function is much faster. </P ><P > The following constants are defined: 1 = IMAGETYPE_GIF, 2 = IMAGETYPE_JPEG, 3 = IMAGETYPE_PNG, 4 = IMAGETYPE_SWF, 5 = IMAGETYPE_PSD, 6 = IMAGETYPE_BMP, 7 = IMAGETYPE_TIFF_II (intel byte order), 8 = IMAGETYPE_TIFF_MM (motorola byte order), 9 = IMAGETYPE_JPC, 10 = IMAGETYPE_JP2, 11 = IMAGETYPE_JPX, 12 = IMAGETYPE_SWC. </P ><P > This function can be used to avoid calls to other exif functions with unsupported file types or in conjunction with $_SERVER['HTTP_ACCEPT'] to check whether or not the viewer is able to see a specific image in his browser. </P ><P > <DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > This function is only available in PHP 4 compiled using <TT CLASS="option" >--enable-exif</TT >. </P ><P > This function does not require the GD image library. </P ><P > See also <A HREF="function.getimagesize.html" ><B CLASS="function" >getimagesize()</B ></A >. </P ></BLOCKQUOTE ></DIV > </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="ref.image.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.exif-read-data.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Image functions</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.image.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >exif_read_data</TD ></TR ></TABLE ></DIV ></BODY ></HTML >