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php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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><H1
><A
NAME="function.exif-imagetype"
></A
>exif_imagetype</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN44534"
></A
><P
>    (PHP 4 &#62;= 4.3.0, PHP 5)</P
>exif_imagetype&nbsp;--&nbsp;Determine the type of an image</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44537"
></A
><H2
>Descrição</H2
>int <B
CLASS="methodname"
>exif_imagetype</B
> ( string filename )<BR
></BR
><P
>&#13;    <B
CLASS="function"
>exif_imagetype()</B
> reads the first bytes of an image and
    checks its signature.
   </P
><P
>&#13;    <B
CLASS="function"
>exif_imagetype()</B
> can be used to avoid calls to other 
    <A
HREF="ref.exif.html"
>exif</A
> functions with unsupported file types 
    or in conjunction with <CODE
CLASS="varname"
>$_SERVER['HTTP_ACCEPT']</CODE
> to check 
    whether or not the viewer is able to see a specific image in the browser.
   </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44551"
></A
><H2
>Parâmetros</H2
><P
>&#13;    <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>filename</CODE
></DT
><DD
><P
>&#13;        The image being checked.
       </P
></DD
></DL
></DIV
>
   </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44560"
></A
><H2
>Valores de retornado</H2
><P
>&#13;    When a correct signature is found, the appropriate constant value 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
    <B
CLASS="function"
>exif_imagetype()</B
> is much faster.
   </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44566"
></A
><H2
>Histórico</H2
><P
>&#13;    <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN44569"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>Versão</TH
><TH
>Descrição</TH
></TR
></THEAD
><TBODY
><TR
><TD
>4.3.2</TD
><TD
>&#13;         Support for <ACRONYM
CLASS="acronym"
>JPC</ACRONYM
>, <ACRONYM
CLASS="acronym"
>JP2</ACRONYM
>,
         <ACRONYM
CLASS="acronym"
>JPX</ACRONYM
>, <ACRONYM
CLASS="acronym"
>JB2</ACRONYM
>,
         <ACRONYM
CLASS="acronym"
>XBM</ACRONYM
>, and <ACRONYM
CLASS="acronym"
>WBMP</ACRONYM
>
        </TD
></TR
><TR
><TD
>4.3.0</TD
><TD
>Support for <ACRONYM
CLASS="acronym"
>SWC</ACRONYM
></TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
   </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44589"
></A
><H2
>Constantes pré-definidas</H2
><P
>&#13;    The following constants are defined, and represent possible 
    <B
CLASS="function"
>exif_imagetype()</B
> return values:
    <DIV
CLASS="table"
><A
NAME="AEN44593"
></A
><P
><B
>Tabela 1. Imagetype Constants</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>Value</TH
><TH
>Constant</TH
></TR
></THEAD
><TBODY
><TR
><TD
>1</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_GIF</B
></TT
></TD
></TR
><TR
><TD
>2</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_JPEG</B
></TT
></TD
></TR
><TR
><TD
>3</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_PNG</B
></TT
></TD
></TR
><TR
><TD
>4</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_SWF</B
></TT
></TD
></TR
><TR
><TD
>5</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_PSD</B
></TT
></TD
></TR
><TR
><TD
>6</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_BMP</B
></TT
></TD
></TR
><TR
><TD
>7</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_TIFF_II</B
></TT
> (intel byte order)</TD
></TR
><TR
><TD
>8</TD
><TD
>&#13;         <TT
CLASS="constant"
><B
>IMAGETYPE_TIFF_MM</B
></TT
> (motorola byte order)
        </TD
></TR
><TR
><TD
>9</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_JPC</B
></TT
></TD
></TR
><TR
><TD
>10</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_JP2</B
></TT
></TD
></TR
><TR
><TD
>11</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_JPX</B
></TT
></TD
></TR
><TR
><TD
>12</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_JB2</B
></TT
></TD
></TR
><TR
><TD
>13</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_SWC</B
></TT
></TD
></TR
><TR
><TD
>14</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_IFF</B
></TT
></TD
></TR
><TR
><TD
>15</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_WBMP</B
></TT
></TD
></TR
><TR
><TD
>16</TD
><TD
><TT
CLASS="constant"
><B
>IMAGETYPE_XBM</B
></TT
></TD
></TR
></TBODY
></TABLE
></DIV
>       
   </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44665"
></A
><H2
>Exemplos</H2
><P
>&#13;    <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN44668"
></A
><P
><B
>Exemplo 1. <B
CLASS="function"
>exif_imagetype()</B
> example</B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#007700">if (</font><font color="#0000BB">exif_imagetype</font><font color="#007700">(</font><font color="#DD0000">'image.gif'</font><font color="#007700">) != </font><font color="#0000BB">IMAGETYPE_GIF</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'The picture is not a gif'</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
   </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN44672"
></A
><H2
>Veja também</H2
><P
>&#13;    <P
></P
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><A
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><B
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></A
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></P
>
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