PHP UTF-8和Unicode编号互转

PHP UTF-8和Unicode编号互转    /**     * utf-8 转unicode     *     * @param string $name     * @return string     */    function utf8_unicode($name){        $name = iconv('UTF-8', 'UCS-2', $name);        $len  = strlen($name);        $str  = '';        for ($i = 0; $i < $len - 1; $i = $i + 2){            $c  = $name[$i];            $c2 = $name[$i + 1];            if (ord($c) > 0){   //两个字节的文字                $str .= '\u'.base_convert(ord($c), 10, 16).str_pad(base_convert(ord($c2), 10, 16), 2, 0, STR_PAD_LEFT);                //$str .= base_convert(ord($c), 10, 16).str_pad(base_convert(ord($c2), 10, 16), 2, 0, STR_PAD_LEFT);            } else {                $str .= '\u'.str_pad(base_convert(ord($c2), 10, 16), 4, 0, STR_PAD_LEFT);                //$str .= str_pad(base_convert(ord($c2), 10, 16), 4, 0, STR_PAD_LEFT);            }        }        $str = strtoupper($str);//转换为大写        return $str;    }    /**     * unicode 转 utf-8     *     * @param string $name     * @return string     */    function unicode_decode($name)    {        $name = strtolower($name);        // 转换编码，将Unicode编码转换成可以浏览的utf-8编码        $pattern = '/([\w]+)|(\\\u([\w]{4}))/i';        preg_match_all($pattern, $name, $matches);        if (!empty($matches))        {            $name = '';            for ($j = 0; $j < count($matches[0]); $j++)            {                $str = $matches[0][$j];                if (strpos($str, '\\u') === 0)                {                    $code = base_convert(substr($str, 2, 2), 16, 10);                    $code2 = base_convert(substr($str, 4), 16, 10);                    $c = chr($code).chr($code2);                    $c = iconv('UCS-2', 'UTF-8', $c);                    $name .= $c;                }                else                {                    $name .= $str;                }            }        }        return $name;    }