how to fetch json fom url in php

Question

I am trying to make a php page tp print json data for this i m using one paraeter for which i needed to fetch json from another url.I used the code given in other stackoverflow ans but it always giving 0.I tried everything but it always giving 0.My php code is:

<?php
if(isset($_POST['add']))
{
require_once('loginConnect.php');



 $bookname=$_POST['bookname'];




$url = "http://example/star_avg.php?bookName=$bookname";
$json = file_get_contents($url);
$json_data = json_decode($json,TRUE);




 echo 'data' + $json_data->results[0]->{'num'};

?>

My json data from other url is: {"result":[{"avg":"3.9","num":"3"}]}

try print_r() for $json_data, and display the result here — MuthaFury
– MuthaFury, Commented Aug 30, 2016 at 3:25
Since you have passed true while calling json_decode($json,true), you cannot access the data as object, try $json_data['results'][0]['num'] instead $json_data->results[0]->{'num'} — Rohit Khatri
– Rohit Khatri, Commented Aug 30, 2016 at 3:29

BeetleJuice · Accepted Answer · 2016-08-30 03:34:15Z

7

You see 0 printed because you're performing an addition + between the string data and a non-existent property. In PHP, to concatenate strings, do not use +; instead, use the dot . operator

In addition, because you're using true as the 2nd parameter to json_decode, what you get back is an array of arrays. Use the array notation [] rather than the object notation -> to access members.

$json_data = json_decode($json,TRUE);
$num = $json_data['result'][0]['num']; //<- array notation
echo 'data: '.$num; //prints data: 3

Live demo

edited Aug 30, 2016 at 3:34

answered Aug 30, 2016 at 3:25

BeetleJuice

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4 Comments

Nicky Manali Over a year ago

thank u very much it works perfectly.I need to ask one more ques that can i use more than pne url to fetch json differently

BeetleJuice Over a year ago

@NickyManali I don't understand the question

Nicky Manali Over a year ago

okk can i use more than one url to fetch json data.Like in above qus i have one url like that can i use two url in same php code to fetch json data.

BeetleJuice Over a year ago

@NickyManali sure. If you put the urls in to an array called $urls, you could then do foreach($urls as $url){...}. In each iteration of the loop, use $url to fetch and process the JSON from a new location

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