weather.php

<?php

$url = "https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20geo.places%20where%20woeid%3D12781740&format=json&diagnostics=true&callback=";
// $url = "https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20geo.places%20where%20text%3D%22Macalester%20-%20Groveland%2C%20MN%22&format=json&diagnostics=true&callback=";
// $url = "https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20geo.places%20where%20woeid%3D29306623&format=json&diagnostics=true&callback=";
$text = file_get_contents($url);
$data = json_decode($text, true);

function get_location($data) {

	$d = $data['query']['results']['place'];
	$r = [];

	// specificity descending
	$keys = ['locality2', 'locality1', 'admin3', 'admin2', 'admin1', 'country'];

	foreach ($keys as $key) {
		if (isset($d[$key])) {
			$r[] = $d[$key]['content'];
		}
	}

	return $r;
}


$location = get_location($data);

var_dump($location);

echo join($location, ", ");


/*
array(4) {
  [0]=>
  string(10) "Vestamager"
  [1]=>
  string(10) "Copenhagen"
  [2]=>
  string(11) "Hovedstaden"
  [3]=>
  string(7) "Denmark"
}
Vestamager, Copenhagen, Hovedstaden, Denmark
*/

/*
array(5) {
  [0]=>
  string(22) "Macalester - Groveland"
  [1]=>
  string(8) "St. Paul"
  [2]=>
  string(6) "Ramsey"
  [3]=>
  string(9) "Minnesota"
  [4]=>
  string(13) "United States"
}
Macalester - Groveland, St. Paul, Ramsey, Minnesota, United States
*/

/*
array(4) {
  [0]=>
  string(8) "St. Paul"
  [1]=>
  string(6) "Ramsey"
  [2]=>
  string(9) "Minnesota"
  [3]=>
  string(13) "United States"
}
St. Paul, Ramsey, Minnesota, United States
*/

?>