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>utf8_encode</H1
><DIV
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NAME="AEN95751"
></A
><P
> (PHP 3>= 3.0.6, PHP 4 )</P
>utf8_encode -- encodes an ISO-8859-1 string to UTF-8</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN95754"
></A
><H2
>Description</H2
>string <B
CLASS="methodname"
>utf8_encode</B
> ( string data)<BR
></BR
><P
> This function encodes the string <TT
CLASS="parameter"
><I
>data</I
></TT
> to
<TT
CLASS="literal"
>UTF-8</TT
>, and returns the encoded version.
<TT
CLASS="literal"
>UTF-8</TT
> is a standard mechanism used by
<SPAN
CLASS="acronym"
>Unicode</SPAN
> for encoding <I
CLASS="glossterm"
>wide
character</I
> values into a byte stream.
<TT
CLASS="literal"
>UTF-8</TT
> is transparent to plain <SPAN
CLASS="abbrev"
>ASCII</SPAN
>
characters, is self-synchronized (meaning it is possible for a program to
figure out where in the bytestream characters start) and can be used with
normal string comparison functions for sorting and such. PHP encodes
<TT
CLASS="literal"
>UTF-8</TT
> characters in up to four bytes, like this:
<DIV
CLASS="table"
><A
NAME="AEN95771"
></A
><P
><B
>Table 1. UTF-8 encoding</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>bytes</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>bits</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>representation</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>1</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>7</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>0bbbbbbb</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>2</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>11</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>110bbbbb 10bbbbbb</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>3</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>16</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>1110bbbb 10bbbbbb 10bbbbbb</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>4</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>21</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>11110bbb 10bbbbbb 10bbbbbb 10bbbbbb</TD
></TR
></TBODY
></TABLE
></DIV
>
Each <TT
CLASS="replaceable"
><I
>b</I
></TT
> represents a bit that can be
used to store character data.
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