php 汉字第一个字母排序

编写Class类

<?php

namespace utfmode;


use pinyinsrcPinyin;

class Utfmode{

    /**
    * 取汉字的第一个字的首字母
    * @param type $str
    * @return string|null
    * @user qichao
    * @date 2017-04-13
    */
    public function _getFirstCharter($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 || $asc==-9743) return 'B';
        if($asc>=-19775&&$asc<=-19219) return 'C';
        if($asc>=-19218&&$asc<=-18711 || $asc==-9767) return 'D';
        if($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 || $asc==-7182 || $asc==-6928 ) return 'L';
        if($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 || $asc==-6745) return 'P';
        if($asc>=-14630&&$asc<=-14150 || $asc==-7703) return 'Q';
        if($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;
    }

    //调用方法： $this->_getFirstCharter('张家口');

    //然后下一步，要对这个二维数据排序。我思考了很久，后来想到了方案，先在循环里调用这个取首字母的方法，然后以这个字母作为key，因为php里有根据key排序的方法，所以我的代码写成这样就搞定了：

    public function getRegionlist($regionData)
    {
        $settlesRes = array();
        foreach ($regionData as $key=>$sett){
            $name = $sett['title'];
            $nameFirstChar = $this->_getFirstCharter($name); //取出第一个汉字的首字母
            $settlesRes[$nameFirstChar][]=["id"=>$sett["cityid"],"name"=>$sett["title"]];//以这个首字母作为key
        }
        ksort($settlesRes);
        return $settlesRes;
    }

    /**
     * @param $regionData
     * @return array
     */
    public function getDingzhilist($regionData)
    {
        $settlesRes = array();
        foreach ($regionData as $key=>$sett){
            $name = $sett['title'];
            $nameFirstChar = $this->_getFirstCharter($name); //取出第一个汉字的首字母
            $pinyin = new Pinyin();
            $valuePinyin = $pinyin->convert($name);
            //获取检拼
            $cityPY = $this->pinyin1($name);

            $settlesRes[$nameFirstChar][]=["id"=>$sett["id"],"name"=>$sett["title"],'pinyin'=>$valuePinyin,'cityPY'=>strtolower($cityPY)];//以这个首字母作为key
        }
        ksort($settlesRes);
        foreach ($settlesRes as $key=>$value){
            $data['OnePinYin'][] = ['cityName'=>$key];
            $data['data'][] = ['cityName'=>$key,'cityPY'=>strtolower($key),'cityPinYin'=>strtolower($key)];
            if(is_array($value)){
                foreach ($value as $k=>$v){
                    $data['data'][] = ['cityName'=>$v['name'],'cityPY'=>$v['cityPY'],'cityPinYin'=>implode('',$v['pinyin'])];
                }
            }
        }
//        header("Content-type:text/html;charset=utf-8");
//        $cc =var_export($data,1);
//        file_put_contents("ceshi.text",$cc);
        return $data;
    }

    /**
     * 获取拼音简拼
     * @param $zh
     * @return string
     */
    function pinyin1($zh){
        $ret = "";
        $s1 = iconv("UTF-8","gb2312", $zh);
        $s2 = iconv("gb2312","UTF-8", $s1);
        if($s2 == $zh){$zh = $s1;}
        for($i = 0; $i < strlen($zh); $i++){
            $s1 = substr($zh,$i,1);
            $p = ord($s1);
            if($p > 160){
                $s2 = substr($zh,$i++,2);
                $ret .= $this->_getFirstCharter($s2);
            }else{
                $ret .= $s1;
            }
        }
        return $ret;
    }
}

前台代码编写

        $utfmode = new Utfmode();
        $list = $utfmode->getRegionlist($data);