Web студия "GrandView"

Description

string utf8_encode ( string data )

This function encodes the string data to UTF-8, and returns the encoded version. UTF-8 is a standard mechanism used by Unicode for encoding wide character values into a byte stream. UTF-8 is transparent to plain ASCII 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 UTF-8 characters in up to four bytes, like this:

Таблица 1. UTF-8 encoding

bytes	bits	representation
1	7	0bbbbbbb
2	11	110bbbbb 10bbbbbb
3	16	1110bbbb 10bbbbbb 10bbbbbb
4	21	11110bbb 10bbbbbb 10bbbbbb 10bbbbbb

Each b represents a bit that can be used to store character data.

add a note User Contributed Notes
utf8_encode

luka8088 at gmail dot com
22-Jun-2007 07:19


simple HTML to UTF-8 conversion:



function html_to_utf8 ($data)

    {

    return preg_replace("/\\&\\#([0-9]{3,10})\\;/e", '_html_to_utf8("\\1")', $data);

    }



function _html_to_utf8 ($data)

    {

    if ($data > 127)

        {

        $i = 5;

        while (($i--) > 0)

            {

            if ($data != ($a = $data % ($p = pow(64, $i))))

                {

                $ret = chr(base_convert(str_pad(str_repeat(1, $i + 1), 8, "0"), 2, 10) + (($data - $a) / $p));

                for ($i; $i > 0; $i--)

                    $ret .= chr(128 + ((($data % pow(64, $i)) - ($data % ($p = pow(64, $i - 1)))) / $p));

                break;

                }

            }

        }

        else

        $ret = "&#$data;";

    return $ret;

    }



Example:

echo html_to_utf8("a b &#269; &#263; &#382; &#12371; &#12395; &#12385; &#12431; ()[]{}!#$?* &lt; &#62;");



Output:

a b