PHP获取中文字符拼音首字母

    /**
     * @name php获取中文字符拼音首字母
     * @param $str
     * @return null|string
     */
    public function getFirstCharter($str)
    {
        if (empty($str)) {
            return ‘‘;
        }
        $fchar = ord($str{0});
        if ($fchar >= ord(‘A‘) && $fchar <= ord(‘z‘)) {
            return strtoupper($str{0});
        }

        $s1 = iconv(‘UTF-8‘, ‘gb2312‘, $str);

        $s2 = iconv(‘gb2312‘, ‘UTF-8‘, $s1);

        $s = $s2 == $str ? $s1 : $str;

        $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
        if ($asc >= -20319 && $asc <= -20284) {
            return ‘A‘;
        }

        if ($asc >= -20283 && $asc <= -19776) {
            return ‘B‘;
        }

        if ($asc >= -19775 && $asc <= -19219) {
            return ‘C‘;
        }

        if ($asc >= -19218 && $asc <= -18711) {
            return ‘D‘;
        }

        if ($asc >= -18710 && $asc <= -18527) {
            return ‘E‘;
        }

        if ($asc >= -18526 && $asc <= -18240) {
            return ‘F‘;
        }

        if ($asc >= -18239 && $asc <= -17923) {
            return ‘G‘;
        }

        if ($asc >= -17922 && $asc <= -17418) {
            return ‘H‘;
        }

        if ($asc >= -17417 && $asc <= -16475) {
            return ‘J‘;
        }

        if ($asc >= -16474 && $asc <= -16213) {
            return ‘K‘;
        }

        if ($asc >= -16212 && $asc <= -15641) {
            return ‘L‘;
        }

        if ($asc >= -15640 && $asc <= -15166) {
            return ‘M‘;
        }

        if ($asc >= -15165 && $asc <= -14923) {
            return ‘N‘;
        }

        if ($asc >= -14922 && $asc <= -14915) {
            return ‘O‘;
        }

        if ($asc >= -14914 && $asc <= -14631) {
            return ‘P‘;
        }

        if ($asc >= -14630 && $asc <= -14150) {
            return ‘Q‘;
        }

        if ($asc >= -14149 && $asc <= -14091) {
            return ‘R‘;
        }

        if ($asc >= -14090 && $asc <= -13319) {
            return ‘S‘;
        }

        if ($asc >= -13318 && $asc <= -12839) {
            return ‘T‘;
        }

        if ($asc >= -12838 && $asc <= -12557) {
            return ‘W‘;
        }

        if ($asc >= -12556 && $asc <= -11848) {
            return ‘X‘;
        }

        if ($asc >= -11847 && $asc <= -11056) {
            return ‘Y‘;
        }

        if ($asc >= -11055 && $asc <= -10247) {
            return ‘Z‘;
        }

        return ‘其他‘;
    }

    /**
     * 格式化游戏专区
     * Author LHC
     * DateTime 2017-06-04T15:48:59+0800
     */
    public function formatGameCharter($gameData)
    {
        if (empty($gameData)) {
            return $gameData;
        }
        $keyArr = [];
        $gameZone = [];
        foreach ($gameData as $game) {
            $key = $this->getFirstCharter($game[‘name‘]);
            if (in_array($key, $keyArr)) {
                $gameZone[$key][‘key‘] = $key;
                $gameZone[$key][‘list‘][] = [
                    ‘gameId‘ => intval($game[‘id‘]),
                    ‘appId‘ => intval($game[‘appId‘]),
                    ‘gameName‘ => $game[‘name‘],
                ];
            } else {
                $keyArr[] = $key;
            }
        }
        array_multisort($gameZone);
        $gameZone = array_values($gameZone);
        return $gameZone;
    }