“此json数据”å“陆地岛屿”，这是写在数据库视图中的-ã…“陆地岛屿”？请帮我找错地方`

<?php
$link = mysqli_connect('localhost','root','password','days');
$string = file_get_contents('data.json', true);
$json_a = json_decode($string, true);
foreach($json_a as $arr)
{
    $name = $arr['countryName'];
    $query = "INSERT INTO countries(name) VALUES ('$name');";
    mysqli_query($link,$query);
    $country_id = mysqli_insert_id($link);
    foreach ($arr['regions'] as $region)
    {
        $region_name = $region['name'];
        $query = "INSERT INTO regions(country_id,name,created_at,updated_at) VALUES ($country_id,'$region_name',NOW(),NOW());";
        mysqli_query($link,$query);
    }
}
?>`