<?php
/**
* @author Tech
*/
class Character
{
/**
* 二維數組根據首字母分組排序
* @param array $data 二維數組
* @param string $targetKey 首字母的鍵名
* @return array 根據首字母關聯的二維數組
*/
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;
}
/**
* 按字母排序
* @param array $data
* @return array
*/
public function sortInitials(array $data)
{
$sortData = [];
foreach ($data as $key => $value) {
$sortData[$value['initials']][] = $value;
}
ksort($sortData);
return $sortData;
}
/**
* 獲取首字母
* @param string $str 漢字字符串
* @return string 首字母
*/
public function getInitials($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 null;
}
}
項目中直接引入即可,如果需要命名空間,可以自行添加,下面是我們看看怎麼用。
// 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,然後調用分組方法
$data = (new Character)->groupByInitials($data, 'area_name');
下面的結果是不是你想要的呢,不論是做app還是網頁,都可以用
$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'
)
)
);