<?php/** * @author Tech */class Character{ /** * 二维数组根据首字母分组排序 * @param array $data 二维数组 * @param string $targetKey 首字母的键名 * @return array 根据首字母关联的二维数组 */ 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; } /** * 获取首字母 * @param string $str 汉字字符串 * @return string 首字母 */ public function getInitials($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 && $asc <= -10247) { return 'Z'; } return null; }} |
项目中直接引入即可，如果需要命名空间，可以自行添加，下面是我们看看怎么用。
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// 按首字母排序$data = [ ['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'],];// 初始化，然后调用分组方法$data = (new Character)->groupByInitials($data, 'area_name'); |
下面的结果是不是你想要的呢，不论是做app还是网页，都可以用
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$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' => '广东', 'initials' => 'G' ) , 1 => array( 'id' => 7, 'area_name' => '广西', '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' => '江苏', 'initials' => 'J' ) , 1 => array( 'id' => 5, 'area_name' => '江西', 'initials' => 'J' ) ) , 'S' => array( 0 => array( 'id' => 1, 'area_name' => '山东', 'initials' => 'S' ) )); |