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php-manual-en-4.3.0-2mdk.noarch.rpm

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><H1
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>LVII. Mimetype Functions</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN51539"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="mime-magic.intro"
></A
>Introduction</H1
><P
>&#13;     The functions in this module try to guess the content type
     and encoding of a file by looking for certain 
     <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>magic</I
></SPAN
> byte sequences at specific
     positions within the file. While this is not a bullet proof
     approach the heuristics used do a very good job.
    </P
><P
>&#13;     This extension is derivated from Apache mod_mime_magic, 
     which is itself based on the <TT
CLASS="filename"
>file</TT
> 
     command maintaind by Ian F. Darwin. See the source code for
     further historic and copyright information.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="mime-magic.requirements"
></A
>Requirements</H1
><P
>No external libraries are needed to build this extension.</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="mime-magic.installation"
></A
>Installation</H1
><P
>&#13;  You must compile PHP with the configure switch
  <TT
CLASS="option"
>--enable-mime-magic</TT
> to get support for
  mime-type functions. The extension needs a copy of the
  <TT
CLASS="filename"
>magic.mime</TT
> as distributed with the
  <TT
CLASS="filename"
>file</TT
> command. This file also part of most recent Linux
  distributions and usually stored in the <TT
CLASS="filename"
>/usr/share/misc</TT
>
  directory. 
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="mime-magic.configuration"
></A
>Runtime Configuration</H1
><P
>&#13;The behaviour of these functions is affected by settings in <TT
CLASS="filename"
>php.ini</TT
>.
</P
><P
>&#13;    <DIV
CLASS="table"
><A
NAME="AEN51561"
></A
><P
><B
>Table 1. Mimetype configuration options</B
></P
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>Changeable</TH
></TR
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><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>mime_magic.magicfile</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>"/usr/share/misc/magic.mime"</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
></TR
></TBODY
></TABLE
></DIV
>
 For further details and definition of the PHP_INI_* constants see
 <A
HREF="function.ini-set.html"
><B
CLASS="function"
>ini_set()</B
></A
>.
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="mime-magic.resources"
></A
>Resource Types</H1
><P
>This extension has no resource types defined.</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="mime-magic.constants"
></A
>Predefined Constants</H1
><P
>This extension has no constants defined.</P
></DIV
></DIV
><DIV
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><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="function.mime-content-type.html"
>mime_content_type</A
>&nbsp;--&nbsp;Detect MIME Content-type for a file</DT
></DL
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