解析从Google时区API返回的JSON

Question

I am trying to perform the simple task of using Google's timezone API to look up the timezone of given coordinates. I am then trying to parse the returned JSON just to show the time zone itself. Does anyone know what I am doing wrong here? Any help would be great! Thank you!

<?php

$jsonObject = file_get_contents("https://maps.googleapis.com/maps/api/timezone/json?    
timestamp=0&sensor=true&location=39.6034810,-119.6822510");

foreach($jsonObject as $p)
{
    echo "$p[timeZoneId]";
}

?>

Answer 1

file_get_contents returns a string:

$object = json_decode($jsonObject);
echo $object->timeZoneId;

Answer 2

You need to decode the json object. It's just a string right now, which foreach won't work on. (only arrays or objects).

<?php

$jsonObject = file_get_contents("https://maps.googleapis.com/maps/api/timezone/json?    
timestamp=0&sensor=true&location=39.6034810,-119.6822510");

$jsonObject = json_decode($jsonObject);

foreach($jsonObject as $p)
{
    echo "$p is $jsonObject[$p]";
}

?>

Answer 3

You need to parse the response from Google (which is really just text in the JSON format) into a PHP array. Use something like this:

$json_text = file_get_contents(...);
$obj = json_decode($json_text, true);
foreach ($obj as $p)
{
    echo "$p[timeZoneId]";
}

I think you'll want to pass true to json_decode so the result is transformed into an easy-to-use associative array. Read here for more information. Good luck.