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<?php defined('SYSPATH') OR die('No direct access allowed.');
/**
* utf8::from_unicode
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007 Kohana Team
* @copyright (c) 2005 Harry Fuecks
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*/
function _from_unicode($arr)
{
ob_start();
$keys = array_keys($arr);
foreach ($keys as $k)
{
// ASCII range (including control chars)
if (($arr[$k] >= 0) AND ($arr[$k] <= 0x007f))
{
echo chr($arr[$k]);
}
// 2 byte sequence
elseif ($arr[$k] <= 0x07ff)
{
echo chr(0xc0 | ($arr[$k] >> 6));
echo chr(0x80 | ($arr[$k] & 0x003f));
}
// Byte order mark (skip)
elseif ($arr[$k] == 0xFEFF)
{
// nop -- zap the BOM
}
// Test for illegal surrogates
elseif ($arr[$k] >= 0xD800 AND $arr[$k] <= 0xDFFF)
{
// Found a surrogate
trigger_error('utf8::from_unicode: Illegal surrogate at index: '.$k.', value: '.$arr[$k], E_USER_WARNING);
return FALSE;
}
// 3 byte sequence
elseif ($arr[$k] <= 0xffff)
{
echo chr(0xe0 | ($arr[$k] >> 12));
echo chr(0x80 | (($arr[$k] >> 6) & 0x003f));
echo chr(0x80 | ($arr[$k] & 0x003f));
}
// 4 byte sequence
elseif ($arr[$k] <= 0x10ffff)
{
echo chr(0xf0 | ($arr[$k] >> 18));
echo chr(0x80 | (($arr[$k] >> 12) & 0x3f));
echo chr(0x80 | (($arr[$k] >> 6) & 0x3f));
echo chr(0x80 | ($arr[$k] & 0x3f));
}
// Out of range
else
{
trigger_error('utf8::from_unicode: Codepoint out of Unicode range at index: '.$k.', value: '.$arr[$k], E_USER_WARNING);
return FALSE;
}
}
$result = ob_get_contents();
ob_end_clean();
return $result;
}
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