1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.5 $ -->
<!-- splitted from ./en/functions/xml.xml, last change in rev 1.2 -->
<refentry id="function.utf8-encode">
<refnamediv>
<refname>utf8_encode</refname>
<refpurpose>Encodes an ISO-8859-1 string to UTF-8</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>string</type><methodname>utf8_encode</methodname>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
</methodsynopsis>
<para>
This function encodes the string <parameter>data</parameter> to
<literal>UTF-8</literal>, and returns the encoded version.
<literal>UTF-8</literal> is a standard mechanism used by
<acronym>Unicode</acronym> for encoding <glossterm>wide
character</glossterm> values into a byte stream.
<literal>UTF-8</literal> is transparent to plain <abbrev>ASCII</abbrev>
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
<literal>UTF-8</literal> characters in up to four bytes, like this:
<table>
<title>UTF-8 encoding</title>
<tgroup cols="3">
<thead>
<row>
<entry>bytes</entry>
<entry>bits</entry>
<entry>representation</entry>
</row>
</thead>
<tbody>
<row>
<entry>1</entry>
<entry>7</entry>
<entry>0bbbbbbb</entry>
</row>
<row>
<entry>2</entry>
<entry>11</entry>
<entry>110bbbbb 10bbbbbb</entry>
</row>
<row>
<entry>3</entry>
<entry>16</entry>
<entry>1110bbbb 10bbbbbb 10bbbbbb</entry>
</row>
<row>
<entry>4</entry>
<entry>21</entry>
<entry>11110bbb 10bbbbbb 10bbbbbb 10bbbbbb</entry>
</row>
</tbody>
</tgroup>
</table>
Each <replaceable>b</replaceable> represents a bit that can be
used to store character data.
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->
|
