3

私の目標：

ユーザーの json リストをクレジットで並べ替えます。

私の問題:

クレジットはソートされますが、逆の順序になります。

私の結果:

Position: 1
Username: abc
Credits: 12

Position: 2
Username: bcd
Credits: 123

Position: 3
Username: cde
Credits: 1245

必要なもの:

Position: 1
Username: abc
Credits: 1234

Position: 2
Username: bcd
Credits: 123

Position: 3
Username: cde
Credits: 12

私の質問：

クレジットでソートされた適切な順序で名前を並べ替えるにはどうすればよいですか?

私のphpコード：

<?php
$json = '{"id":1,"jsonrpc":"2.0","total":50,"result":[{"id":1,"username":"Ashley","credits":684921},{"id":2,"username":"Caroline","credits":113045},{"id":3,"username":"Alexandra","credits":669133},{"id":4,"username":"Katelyn","credits":735955},{"id":5,"username":"Ashley","credits":202478},{"id":6,"username":"Anna","credits":854266},{"id":7,"username":"Lily","credits":406425},{"id":8,"username":"Samantha","credits":430603},{"id":9,"username":"Caroline","credits":380785},{"id":10,"username":"Paige","credits":961596},{"id":11,"username":"Bailey","credits":67660},{"id":12,"username":"Kimberly","credits":610751},{"id":13,"username":"Maya","credits":446787},{"id":14,"username":"Maria","credits":818538},{"id":15,"username":"Ella","credits":789682},{"id":16,"username":"Olivia","credits":906604},{"id":17,"username":"Arianna","credits":177500},{"id":18,"username":"Maya","credits":592490},{"id":19,"username":"Aubrey","credits":58834},{"id":20,"username":"Sophie","credits":324357},{"id":21,"username":"Julia","credits":288688},{"id":22,"username":"Rachel","credits":932145},{"id":23,"username":"Arianna","credits":848696},{"id":24,"username":"Valeria","credits":272258},{"id":25,"username":"Autumn","credits":301136},{"id":26,"username":"Audrey","credits":317305},{"id":27,"username":"Chloe","credits":975642},{"id":28,"username":"Payton","credits":510533},{"id":29,"username":"Morgan","credits":927493},{"id":30,"username":"Mya","credits":166566},{"id":31,"username":"Lauren","credits":840207},{"id":32,"username":"Trinity","credits":255691},{"id":33,"username":"Jocelyn","credits":272653},{"id":34,"username":"Madeline","credits":58344},{"id":35,"username":"Valeria","credits":972228},{"id":36,"username":"Chloe","credits":919646},{"id":37,"username":"Jessica","credits":390647},{"id":38,"username":"Claire","credits":670709},{"id":39,"username":"Savannah","credits":47721},{"id":40,"username":"Zoe","credits":214133},{"id":41,"username":"Taylor","credits":991001},{"id":42,"username":"Gabrielle","credits":295506},{"id":43,"username":"Katherine","credits":295472},{"id":44,"username":"Vanessa","credits":600895},{"id":45,"username":"Olivia","credits":337541},{"id":46,"username":"Mackenzie","credits":32221},{"id":47,"username":"Bella","credits":461298},{"id":48,"username":"Maria","credits":318094},{"id":49,"username":"Lillian","credits":632622},{"id":50,"username":"Kayla","credits":17062}]}';
$decoded = json_decode($json);
$users = $decoded->result;

function my_sort($a, $b)
{
    if ($a-credits > $b->credits) {
        return -1;
    } else if ($a->credits < $b->credits) {
        return 1;
    } else {
        return 0; 
    }
}
rsort($users, 'my_sort');
   $position = 0;
foreach($users as $user){
   $position = $position + 1;
   $username = $user->username;
   $credits = $user->credits;
   //do something with it:
   echo "Postion: $position<br/>\n Username: $username<br/>\n  Credits:$credits <br/>\n <br/>\n";
   if ($position == 3) {
        break;
    }
}
?>
4

2 に答える 2

5 
function my_sort($a, $b)
{
    if ($a->credits > $b->credits) {
        return -1;
    } else if ($a->credits < $b->credits) {
        return 1;
    } else {
        return 0; 
    }
}

usort($users, 'my_sort');
于 2013-02-14T04:56:51.240 に答える
1

usortの代わりに使用する必要がありますrsort。
php7 では、宇宙船演算子を実行できることに注意してください。

function mySort($a, $b) {
    return $b->credits <=> $a->credits;
}

usort($users, 'mySort');
于 2016-06-17T21:49:35.267 に答える