按拼音首字母排序

<?php $temp = array(); // 按拼音首字母排序
                foreach($res as $key=>$val){ $index = $this->sortByPinyin($val['note_name']); $temp[$index][] = $val; //先用中间变量数组，根据字母A B C..装着集合在一起的 } $list = array(); foreach($temp as $k=>$v){ $list[$k]['index'] = $k; $list[$k]['list'] = $v; } array_multisort($list); //用 array_multisort按键排序，也可用 ksort() // ksort($list);
                $list = array_values($list); //最后将键弄回数字的那些键 ， A, B ,C ... => 0, 1, 2.... /** * [获取字符串的拼音首字母] * @param [type] $str [description] * @return [type] [description] */
    public function sortByPinyin($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; }

最后的结果是：（下面是json的形式）

[
  {
    "index": "A",
    "list": [
      {
        "id": "6",
        "suid": "1",
        "note_name": "哎去"
      },
      {
        "id": "7",
        "suid": "1",
        "note_name": "abf"
      }
    ]
  },
  {
    "index": "B",
    "list": [
      {
        "id": "9",
        "suid": "1",
        "note_name": "标签2"
      }
    ]
  },
  {
    "index": "C",
    "list": [
      {
        "id": "1",
        "suid": "1",
        "note_name": "测试"
      }
    ]
  },
  {
    "index": "D",
    "list": [
      {
        "id": "3",
        "suid": "1",
        "note_name": "DSA"
      }
    ]
  }
]