API数据返回HTML

Question

I have added new data to my API. I want to return it as plain text

This is the API response PHP returns.

 {
    "apiVersion":"1.0", 
    "data":{ 
            "location":"London",:
            { 
             "pressure":"1021",
              "temperature":"23", 
              "skytext":"Sky is Clear",
              "humidity":"40", 
              "wind":"18.36 km/h", 
              "date":"07-10-2015", 
              "day":"Friday" 
             }
      }

I want to return the pressure value on my html page so my users can see the reading. I am having issues displaying it.

This is my PHP api.php

require_once('./includes/config.php');
require_once('./includes/functions.php');
error_reporting(0);
header('Content-Type: text/plain; charset=utf-8;');

$city = $_GET['city'];

if(isset($city)) {

    $weather = new Weather($conf['apikey'], $_GET['f']);
    $weather_current = $weather->get($city, 0, 0, null, null);

    $now = $weather->data(0, $weather_current);

    if($now['location'] !== NULL) {
        echo '{"apiVersion":"1.0", "data":{ "location":"'.$now['location'].'", "temperature":"'.$now['temperature'].'", "pressure":"'.$now['pressure'].'", "skytext":"'.$now['description'].'", "humidity":"'.$now['humidity'].'", "wind":"'.$now['windspeed'].'", "date":"'.$now['date'].'", "day":"'.$now['day'].'" } }';
    } else {
        echo '{"apiVersion":"1.0", "data":{ "error":"The \'city\' requested is not available, make sure it\'s a valid city." } }';
    }
} else {
    echo '{"apiVersion":"1.0", "data":{ "error":"You need to specify the city parameter" } }';
}

Answer 1

In order to fetch data from a JSON source you should parse the data with the json_decode() method. You can then use the second parameter to parse it into an array. If you omit the second parameter you would get an array of objects.

Important: It seems your JSON has a syntax error too. I have added a weather key before the weather information.

$data = '{
    "apiVersion":"1.0",
    "data":{
        "location":"London",
        "weather":{              // Notice the new key!
            "pressure":"1021",
            "temperature":"23",
            "skytext":"Sky is Clear",
            "humidity":"40",
            "wind":"18.36 km/h",
            "date":"07-10-2015",
            "day":"Friday"
        }
    }
}';

$json = json_decode($data, true);

You should then be able to fetch the pressure as an associative array.

$pressure = $json['data']['weather']['pressure']; // Equals: 1021

Hope this can help you, happy coding!