How to get the first Chinese initial letter in PHP and sort it

This article mainly introduces the method of obtaining the first Chinese initial letter in PHP and sorting it, involving PHP array traversal, encoding conversion and array sorting related operation skills. Friends in need can refer to the following

The details are as follows:

Recently I am doing stored value settlement. In the requirements, the settlement homepage needs to be sorted by the first letters of the stores A-Z. My data structure was originally like this:

Array
(
  [0] => Array
    (
      [sid] => 2885842
      [recetcstoredpay] => 24000
      [recetclprinciple] => 23465
      [paytcstoredpay] => 5455
      [paytclprinciple] => 34900
      [sname] => 百宴餐饮---便宜坊烤鸭店
    )
  [1] => Array
    (
      [sid] => 3644191
      [recetcstoredpay] => 89200
      [recetclprinciple] => 406930
      [paytcstoredpay] => 4090
      [paytclprinciple] => 97800
      [sname] => 大长秋餐饮中心
    )
  [2] => Array
    (
      [sid] => 5229673
      [recetcstoredpay] => 26000
      [recetclprinciple] => 45930
      [paytcstoredpay] => 24795
      [paytclprinciple] => 121800
      [sname] => 大众点评网
    )
  [3] => Array
    (
      [sid] => 3715927
      [recetcstoredpay] => 13600
      [recetclprinciple] => 56930
      [paytcstoredpay] => 5710
      [paytclprinciple] => 37800
      [sname] => 江东北路店
    )
  [4] => Array
    (
      [sid] => 3671092
      [recetcstoredpay] => 1280
      [recetclprinciple] => 46930
      [paytcstoredpay] => 128090
      [paytclprinciple] => 149800
      [sname] => 金凤区新馆
    )
  [5] => Array
    (
      [sid] => 1858783
      [recetcstoredpay] => 2040
      [recetclprinciple] => 4465
      [paytcstoredpay] => 245
      [paytclprinciple] => 4900
      [sname] => 浙江西子宾馆
    )
  [6] => Array
    (
      [sid] => 16832117
      [recetcstoredpay] => 81600
      [recetclprinciple] => 470930
      [paytcstoredpay] => 506090
      [paytclprinciple] => 8000
      [sname] => 欢乐谷店
    )
)

According to the requirements, if you want to sort according to the first letter of the first Chinese character of sname, then you first need to write a fetcher The method of initial letters:

/**
* 取汉字的第一个字的首字母
* @param type $str
* @return string|null
*/
public function _getFirstCharter($str){
if(emptyempty($str)){return '';}
$fchar=ord($str{0});
if($fchar>=ord(&#39;A&#39;)&&$fchar<=ord(&#39;z&#39;)) return strtoupper($str{0});
$s1=iconv(&#39;UTF-8&#39;,&#39;gb2312&#39;,$str);
$s2=iconv(&#39;gb2312&#39;,&#39;UTF-8&#39;,$s1);
$s=$s2==$str?$s1:$str;
$asc=ord($s{0})*256+ord($s{1})-65536;
if($asc>=-20319&&$asc<=-20284) return &#39;A&#39;;
if($asc>=-20283&&$asc<=-19776) return &#39;B&#39;;
if($asc>=-19775&&$asc<=-19219) return &#39;C&#39;;
if($asc>=-19218&&$asc<=-18711) return &#39;D&#39;;
if($asc>=-18710&&$asc<=-18527) return &#39;E&#39;;
if($asc>=-18526&&$asc<=-18240) return &#39;F&#39;;
if($asc>=-18239&&$asc<=-17923) return &#39;G&#39;;
if($asc>=-17922&&$asc<=-17418) return &#39;H&#39;;
if($asc>=-17417&&$asc<=-16475) return &#39;J&#39;;
if($asc>=-16474&&$asc<=-16213) return &#39;K&#39;;
if($asc>=-16212&&$asc<=-15641) return &#39;L&#39;;
if($asc>=-15640&&$asc<=-15166) return &#39;M&#39;;
if($asc>=-15165&&$asc<=-14923) return &#39;N&#39;;
if($asc>=-14922&&$asc<=-14915) return &#39;O&#39;;
if($asc>=-14914&&$asc<=-14631) return &#39;P&#39;;
if($asc>=-14630&&$asc<=-14150) return &#39;Q&#39;;
if($asc>=-14149&&$asc<=-14091) return &#39;R&#39;;
if($asc>=-14090&&$asc<=-13319) return &#39;S&#39;;
if($asc>=-13318&&$asc<=-12839) return &#39;T&#39;;
if($asc>=-12838&&$asc<=-12557) return &#39;W&#39;;
if($asc>=-12556&&$asc<=-11848) return &#39;X&#39;;
if($asc>=-11847&&$asc<=-11056) return &#39;Y&#39;;
if($asc>=-11055&&$asc<=-10247) return &#39;Z&#39;;
return null;
}

Then the next step is to sort this two-dimensional data. I thought about it for a long time, and then I came up with a plan. First, call the method of getting the first letter in the loop, and then use this letter as the key. Because there is a method of sorting according to the key in PHP, so my code is written like this:

//门店名称
$shopData = $this->_shopNamesArray;
//根据门店名称第一个汉字的首字母正序排序
$settles = $result['data'];
$settlesRes = array();
foreach ($settles as $sett) {
    $sname = $shopData[$sett['sid']];
    $sett['sname'] = $sname;
    $snameFirstChar = $this->_getFirstCharter($sname); //取出门店的第一个汉字的首字母
    $settlesRes[$snameFirstChar] = $sett;//以这个首字母作为key
}
ksort($settlesRes); //对数据进行ksort排序，以key的值升序排序

Print these data first to see the effect:

Array
(
  [B] => Array
    (
      [sid] => 2885842
      [recetcstoredpay] => 24000
      [recetclprinciple] => 23465
      [paytcstoredpay] => 5455
      [paytclprinciple] => 34900
      [sname] => 百宴餐饮---便宜坊烤鸭店
    )
  [D] => Array
    (
      [sid] => 5229673
      [recetcstoredpay] => 26000
      [recetclprinciple] => 45930
      [paytcstoredpay] => 24795
      [paytclprinciple] => 121800
      [sname] => 大众点评网
    )
  [H] => Array
    (
      [sid] => 16832117
      [recetcstoredpay] => 81600
      [recetclprinciple] => 470930
      [paytcstoredpay] => 506090
      [paytclprinciple] => 8000
      [sname] => 欢乐谷店
    )
  [J] => Array
    (
      [sid] => 3671092
      [recetcstoredpay] => 1280
      [recetclprinciple] => 46930
      [paytcstoredpay] => 128090
      [paytclprinciple] => 149800
      [sname] => 金凤区新馆
    )
  [Z] => Array
    (
      [sid] => 1858783
      [recetcstoredpay] => 2040
      [recetclprinciple] => 4465
      [paytcstoredpay] => 245
      [paytclprinciple] => 4900
      [sname] => 浙江西子宾馆
    )
)

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