Extracting values from JSON response with PHP

Question

I'am sending JSON data to an URL and then I also recieve JSON.
I'm using PHP CURL to recieve the data and show it on my page.
My Problem is that I can only get the json completely and I can't show only a selected value from that JSON data.
I got this already:

//API Url
$url = "https://auth.unilinxx.com/test";

//Initiate cURL.
$ch = curl_init($url);

//The JSON data.
$jsonData = array("value" => "Gideon lol");

//Encode the array into JSON.
$jsonDataEncoded = json_encode($jsonData);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//Tell cURL that we want to send a POST request.
curl_setopt($ch, CURLOPT_POST, 1);

//Attach our encoded JSON string to the POST fields.
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);

//Set the content type to application/json
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json")); 

//Execute the request
$result = curl_exec($ch);

$values = json_decode($result, true);

echo $values["value"];

My result is: {"value":"U heeft Gideon lol gestuurd."}

I like to have only this: U heeft Gideon lol gestuurd.

How can I do that?

Are you viewing the JSON string "auth.unilinxx.com/test" is outputting to help you see what's going on here? It looks like your API is returning a nested JSON array of "value"{"value":{"U heeft... — Aaron Belchamber
– Aaron Belchamber, Commented Aug 8, 2017 at 12:52
unless you have json inside json, this is not a correct result — online Thomas
– online Thomas, Commented Aug 8, 2017 at 12:53
echo $values["value"]; would fail if your output was {"value":"U heeft Gideon lol gestuurd."} so something tells me this code is not what is being ran or $values["value"] is a string of that data structure... — nerdlyist
– nerdlyist, Commented Aug 8, 2017 at 12:53

B. Desai · Accepted Answer · 2017-08-08 12:56:26Z

4

Your entire code is correct you only have to add CURLOPT_RETURNTRANSFER to true in your code. Other wise result will not store in variable. And output to screen directly

<?php
//API Url
$url = "https://auth.unilinxx.com/test";

//Initiate cURL.
$ch = curl_init($url);

//The JSON data.
$jsonData = array("value" => "Gideon lol");

//Encode the array into JSON.
$jsonDataEncoded = json_encode($jsonData);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//Tell cURL that we want to send a POST request.
curl_setopt($ch, CURLOPT_POST, 1);

//Attach our encoded JSON string to the POST fields.
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);

//Set the content type to application/json
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json")); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //<---------- Add this line
//Execute the request
$result = curl_exec($ch);

$values = json_decode($result, true);

echo $values["value"];

edited Aug 8, 2017 at 12:56

answered Aug 8, 2017 at 12:55

B. Desai

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1 Comment

khn Rzk Over a year ago

I am doing the same thing with ajax request, when I just echo the $results it gives the json string but when I add $values = json_decode($result, true); jquery console.log returns null why is that?

Chun Rapeepat · Accepted Answer · 2017-08-08 12:58:25Z

2

is your result variable return string? if it just return TRUE or FALSE please try to add this code

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

answered Aug 8, 2017 at 12:58

Chun Rapeepat

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Comments

Webdeveloper_Jelle · Accepted Answer · 2018-03-21 13:20:20Z

<?php
//API Url
$url = "https://auth.unilinxx.com/test";

//Initiate cURL.
$ch = curl_init($url);

//The JSON data.
$jsonData = array("value" => "Gideon lol");

//Encode the array into JSON.
$jsonDataEncoded = json_encode($jsonData);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//Tell cURL that we want to send a POST request.
curl_setopt($ch, CURLOPT_POST, 1);

//Attach our encoded JSON string to the POST fields.
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);

//Set the content type to application/json
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json")); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //<----- I will add this line
//Execute the request
$result = curl_exec($ch);

$values = json_decode($result, true);

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