$data = '{"location":{"name":"London","region":"City of London, Greater London","country":"United Kingdom","lat":51.52,"lon":-0.11,"tz_id":"Europe/London","localtime_epoch":1672618641,"localtime":"2023-01-02 0:17"},"current":{"last_updated_epoch":1672618500,"last_updated":"2023-01-02 00:15","temp_c":8.0,"temp_f":46.4,"is_day":0,"condition":{"text":"Light rain","icon":"//cdn.weatherapi.com/weather/64x64/night/296.png","code":1183},"wind_mph":4.3,"wind_kph":6.8,"wind_degree":220,"wind_dir":"SW","pressure_mb":1009.0,"pressure_in":29.8,"precip_mm":0.0,"precip_in":0.0,"humidity":93,"cloud":25,"feelslike_c":7.0,"feelslike_f":44.7,"vis_km":10.0,"vis_miles":6.0,"uv":1.0,"gust_mph":5.8,"gust_kph":9.4}}';
$characters = json_decode($data, 1); // decode the JSON feed as array
echo $characters['location']['name'] . '<br>';
echo $characters['current']['condition']['text'] . '<br>';
echo $characters['current']['condition']['code'] . '<br>';
If you want to stay with objects...
$data = '{"location":{"name":"London","region":"City of London, Greater London","country":"United Kingdom","lat":51.52,"lon":-0.11,"tz_id":"Europe/London","localtime_epoch":1672618641,"localtime":"2023-01-02 0:17"},"current":{"last_updated_epoch":1672618500,"last_updated":"2023-01-02 00:15","temp_c":8.0,"temp_f":46.4,"is_day":0,"condition":{"text":"Light rain","icon":"//cdn.weatherapi.com/weather/64x64/night/296.png","code":1183},"wind_mph":4.3,"wind_kph":6.8,"wind_degree":220,"wind_dir":"SW","pressure_mb":1009.0,"pressure_in":29.8,"precip_mm":0.0,"precip_in":0.0,"humidity":93,"cloud":25,"feelslike_c":7.0,"feelslike_f":44.7,"vis_km":10.0,"vis_miles":6.0,"uv":1.0,"gust_mph":5.8,"gust_kph":9.4}}';
$obj = json_decode($data); // decode the JSON feed as object
echo $obj->location->name . '<br>';
echo $obj->current->condition->text . '<br>';
echo "<img src='{$obj->current->condition->icon}'>" . '<br>';
echo $obj->current->condition->code . '<br>';