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>iconv functions</TITLE
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><H1
CLASS="title"
>XL. iconv functions</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN33274"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="iconv.intro"
></A
>Introduction</H1
><P
>&#13;     This module contains an interface to the iconv library functions.
     The iconv library functions convert strings between various
     character sets encodings. The supported character sets depend on the 
     iconv() implementation on your system. Note that the iconv() function
     on some systems may not work as well as you expect. In this case, you
     should install the libiconv library.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="iconv.requirements"
></A
>Requirements</H1
><P
>&#13;     Your systems standard C library must provide the iconv() function or you
     must have libiconv installed on your system. The libiconv library is
     available from <A
HREF="http://www.gnu.org/software/libiconv/"
TARGET="_top"
>http://www.gnu.org/software/libiconv/</A
>.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="iconv.installation"
></A
>Installation</H1
><P
>&#13;  To be able to use the functions defined in this module you must compile
  your PHP interpreter using the configure line
  <TT
CLASS="option"
>--with-iconv[=DIR]</TT
>.
 </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note to Win32 Users: </B
>
   In order to enable this module on a Windows environment, you must copy
   <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>iconv-1.3.dll</I
></SPAN
> from the DLL folder of the PHP/Win32 binary
   package to the SYSTEM32 folder of your windows machine. (Ex: C:\WINNT\SYSTEM32
   or C:\WINDOWS\SYSTEM32). Starting with PHP 4.2.1 the name changed to
   <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>iconv.dll</I
></SPAN
>
  </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="iconv.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="AEN33296"
></A
><P
><B
>Table 1. Iconv configuration options</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Name</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Default</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Changeable</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>iconv.input_encoding</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>ICONV_INPUT_ENCODING</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_ALL</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>iconv.output_encoding</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>ICONV_OUTPUT_ENCODING</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_ALL</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>iconv.internal_encoding</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>ICONV_INTERNAL_ENCODING</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_ALL</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="iconv.resources"
></A
>Resource Types</H1
><P
>This extension has no resource types defined.</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="iconv.constants"
></A
>Predefined Constants</H1
><P
>&#13;  Since PHP 4.3.0 it is possible to identify at runtime which iconv
  implementation is adopted by this extension.
  <DIV
CLASS="table"
><A
NAME="AEN33324"
></A
><P
><B
>Table 2. iconv constants</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>constant</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>type</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>description</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>ICONV_IMPL</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><A
HREF="language.types.string.html"
>string</A
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>The implementation name</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>ICONV_VERSION</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><A
HREF="language.types.string.html"
>string</A
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>The implementation version</TD
></TR
></TBODY
></TABLE
></DIV
>
 </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
   Writing implementation-dependent scripts with these constants should be
   discouraged.
  </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="iconv.seealso"
></A
>See Also</H1
><P
>&#13;     See also the
     <A
HREF="ref.recode.html"
>GNU Recode functions</A
>.
    </P
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="function.iconv-get-encoding.html"
>iconv_get_encoding</A
>&nbsp;--&nbsp;Get current setting for character encoding conversion</DT
><DT
><A
HREF="function.iconv-set-encoding.html"
>iconv_set_encoding</A
>&nbsp;--&nbsp;Set current setting for character encoding conversion</DT
><DT
><A
HREF="function.iconv.html"
>iconv</A
>&nbsp;--&nbsp;Convert string to requested character encoding</DT
><DT
><A
HREF="function.ob-iconv-handler.html"
>ob_iconv_handler</A
>&nbsp;--&nbsp;Convert character encoding as output buffer handler</DT
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