php按照首字母排序,PHP获取汉字首字母并分组排序

class Character

{

    public function groupByInitials(array $data, $targetKey = 'name')
    {
        $data = array_map(function ($item) use ($targetKey) {
        return array_merge($item, [
        'initials' => $this->getInitials($item[$targetKey]),
        ]);
        }, $data);
        $data = $this->sortInitials($data);
        return $data;
    }
    public function sortInitials(array $data)
    {
        $sortData = [];
        foreach ($data as $key => $value) {
        $sortData[$value['initials']][] = $value;
        }
        ksort($sortData);
        return $sortData;
    }

    public function getInitials($str)
    {
            if (empty($str)) {return '';}
            $fchar = ord($str{0});
            if ($fchar >= ord('A') && $fchar <= ord('z')) {
            return strtoupper($str{0});
            }

            // var_dump( $str);
            // die;
            // $s1 = iconv('UTF-8', 'gb2312', $str);
           $s1 = mb_convert_encoding($str,"gb2312","UTF-8");

            // $s2 = iconv('gb2312', 'UTF-8', $s1);
           $s2 = mb_convert_encoding($s1,"UTF-8","gb2312");

            $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 null;
    }
}
 

$data = (new Character)->groupByInitials($num_all, 'clocation');

$num_all= [

['id' => 1, 'area_name' => '山东'],

['id' => 2, 'area_name' => '江苏'],

['id' => 3, 'area_name' => '安徽'],

['id' => 4, 'area_name' => '福建'],

['id' => 5, 'area_name' => '江西'],

['id' => 6, 'area_name' => '广东'],

['id' => 7, 'area_name' => '广西'],

['id' => 8, 'area_name' => '海南'],

['id' => 9, 'area_name' => '河南'],

['id' => 10, 'area_name' => '湖南'],

['id' => 11, 'area_name' => '湖北'],

];

$data = (new Character)->groupByInitials($num_all, 'clocation');