PHP獲取漢字首字母並分組排序

寫在前面

經常我們在做專案的時候，會有按首字母排序的需求

比如：美團的城市選擇

正題網上找了各種，不盡人意，於是，自己就寫了乙個，分享給大家。

<?php

/** * @author tech
*/class character
, $data);
$data = $this->sortinitials($data);
return $data;
}/**
* 按字母排序
* @param  array  $data
* @return array
*/public function sortinitials(array $data)
ksort($sortdata);
return $sortdata;
}/**
* 獲取首字母
* @param  string $str 漢字字串
* @return string 首字母
*/public function getinitials($str)
$fchar = ord($str);
if ($fchar >= ord('a') && $fchar <= ord('z')) );
}$s1  = iconv('utf-8', 'gb2312', $str);
$s2  = iconv('gb2312', 'utf-8', $s1);
$s   = $s2 == $str ? $s1 : $str;
$asc = ord($s) * 256 + ord($s) - 65536;
if ($asc >= -20319 && $asc <= -20284) 
if ($asc >= -20283 && $asc <= -19776) 
if ($asc >= -19775 && $asc <= -19219) 
if ($asc >= -19218 && $asc <= -18711) 
if ($asc >= -18710 && $asc <= -18527) 
if ($asc >= -18526 && $asc <= -18240) 
if ($asc >= -18239 && $asc <= -17923) 
if ($asc >= -17922 && $asc <= -17418) 
if ($asc >= -17417 && $asc <= -16475) 
if ($asc >= -16474 && $asc <= -16213) 
if ($asc >= -16212 && $asc <= -15641) 
if ($asc >= -15640 && $asc <= -15166) 
if ($asc >= -15165 && $asc <= -14923) 
if ($asc >= -14922 && $asc <= -14915) 
if ($asc >= -14914 && $asc <= -14631) 
if ($asc >= -14630 && $asc <= -14150) 
if ($asc >= -14149 && $asc <= -14091) 
if ($asc >= -14090 && $asc <= -13319) 
if ($asc >= -13318 && $asc <= -12839) 
if ($asc >= -12838 && $asc <= -12557) 
if ($asc >= -12556 && $asc <= -11848) 
if ($asc >= -11847 && $asc <= -11056) 
if ($asc >= -11055 && $asc <= -10247) 
return null;
}}

// 按首字母排序

$data = [
['id' => 1, 'area_name' => '山東'],
['id' => 2, 'area_name' => '江蘇'],
['id' => 3, 'area_name' => '安徽'],
['id' => 4, 'area_name' => '福建'],
['id' => 5, 'area_name' => '江西'],
['id' => 6, 'area_name' => '廣東'],
['id' => 7, 'area_name' => '廣西'],
['id' => 8, 'area_name' => '海南'],
['id' => 9, 'area_name' => '河南'],
['id' => 10, 'area_name' => '湖南'],
['id' => 11, 'area_name' => '湖北'],
];// 初始化，然後呼叫分組方法
$data = (new character)->groupbyinitials($data, 'area_name');

$data = array(

'a' => array(
0 => array(
'id' => 3,
'area_name' => '安徽',
'initials' => 'a'
)) ,
'f' => array(
0 => array(
'id' => 4,
'area_name' => '福建',
'initials' => 'f'
)) ,
'g' => array(
0 => array(
'id' => 6,
'area_name' => '廣東',
'initials' => 'g'
) ,1 => array(
'id' => 7,
'area_name' => '廣西',
'initials' => 'g'
)) ,
'h' => array(
0 => array(
'id' => 8,
'area_name' => '海南',
'initials' => 'h'
) ,1 => array(
'id' => 9,
'area_name' => '河南',
'initials' => 'h'
) ,2 => array(
'id' => 10,
'area_name' => '湖南',
'initials' => 'h'
) ,3 => array(
'id' => 11,
'area_name' => '湖北',
'initials' => 'h'
)) ,
'j' => array(
0 => array(
'id' => 2,
'area_name' => '江蘇',
'initials' => 'j'
) ,1 => array(
'id' => 5,
'area_name' => '江西',
'initials' => 'j'
)) ,
's' => array(
0 => array(
'id' => 1,
'area_name' => '山東',
'initials' => 's'))
);

原文

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