如何防止foreach循环从php数组中排除结果

如何解决如何防止foreach循环从php数组中排除结果

这是我的代码

$city_result = '[{"id":"1","name":"Lahore","code":"LHE"},{"id":"2","name":"Rawalpindi","code":"RWP"},{"id":"3","name":"Wah Cantt","code":"RWP"}]';

$cityList = [];
$cities = (array)json_decode($city_result,1);
foreach ($cities as $city) {
    $cityList[$city['code']] = $city['name'];   
}

echo json_encode($cityList,true);

回声返回这个

{"LHE":"Lahore","RWP":"Wah Cantt"}

结果排除城市拉瓦尔品第。我想要的结果应该是

{"LHE":"Lahore","RWP":"Rawalpindi","RWP":"Wah Cantt"}

请帮忙