69 lines
1.6 KiB
PHP
69 lines
1.6 KiB
PHP
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<?php defined('SYSPATH') or die('No direct script access.');
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/**
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* UTF8::from_unicode
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*
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* @package Kohana
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @copyright (c) 2005 Harry Fuecks
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
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*/
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function _from_unicode($arr)
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{
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ob_start();
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$keys = array_keys($arr);
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foreach ($keys as $k)
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{
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// ASCII range (including control chars)
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if (($arr[$k] >= 0) AND ($arr[$k] <= 0x007f))
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{
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echo chr($arr[$k]);
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}
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// 2 byte sequence
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elseif ($arr[$k] <= 0x07ff)
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{
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echo chr(0xc0 | ($arr[$k] >> 6));
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echo chr(0x80 | ($arr[$k] & 0x003f));
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}
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// Byte order mark (skip)
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elseif ($arr[$k] == 0xFEFF)
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{
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// nop -- zap the BOM
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}
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// Test for illegal surrogates
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elseif ($arr[$k] >= 0xD800 AND $arr[$k] <= 0xDFFF)
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{
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// Found a surrogate
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trigger_error('UTF8::from_unicode: Illegal surrogate at index: '.$k.', value: '.$arr[$k], E_USER_WARNING);
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return FALSE;
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}
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// 3 byte sequence
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elseif ($arr[$k] <= 0xffff)
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{
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echo chr(0xe0 | ($arr[$k] >> 12));
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echo chr(0x80 | (($arr[$k] >> 6) & 0x003f));
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echo chr(0x80 | ($arr[$k] & 0x003f));
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}
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// 4 byte sequence
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elseif ($arr[$k] <= 0x10ffff)
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{
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echo chr(0xf0 | ($arr[$k] >> 18));
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echo chr(0x80 | (($arr[$k] >> 12) & 0x3f));
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echo chr(0x80 | (($arr[$k] >> 6) & 0x3f));
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echo chr(0x80 | ($arr[$k] & 0x3f));
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}
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// Out of range
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else
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{
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trigger_error('UTF8::from_unicode: Codepoint out of Unicode range at index: '.$k.', value: '.$arr[$k], E_USER_WARNING);
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return FALSE;
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}
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}
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$result = ob_get_contents();
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ob_end_clean();
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return $result;
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}
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