Call JSON API with params in PHP (with example) - php

Question

Formerly i used XML way to get data from external API. Now, internal company policy orders to use JSON to communicate with API. I know what data i should send in request and how data i'll get back but i have no idea how to call with API by JSON.
My PHP server is localhost.
Let JSON API be located https://api.example.com/service-api and i'm sure it works fine.
Request
{"action":"authorization", "args":{"username":"firstname#dev.com","password":"qpujy676"}}
Callback
{"status":"OK", "token":"8hsa77hh687y3sbdha7ah3dajknfa93"}
I found example but i dont know what is Http_client(), what is it role and what it will do.
$http = new Http_Client();
$http->setUri('https://api.example.com/service-api');
$postdata = array(
'action' => 'authorization',
'args' => array(
'username' => 'firstname#dev.com',
'password' => 'qpujy676',
)
);
if (CRYPT_KEY_API) { //if encrypted data
$postdata ['rand'] = md5(time() . rand(2303, 85500));
$postdata = json_encode($postdata);
$postdata = Crypt::encrypt($postdata);
} else {
$postdata = json_encode($postdata);
}
$http->setRawData($postdata, 'application/json');
$response = $http->request(POST);
if ($response->isSuccessful()) {
$responseData = $response->getBody();
if (CRYPT_KEY_API) { //if encrypted data
$responseData = Crypt::decrypt($responseData);
}
$results = json_decode($responseData, true);
} else {
$error_message = "<p>Error</p>\n";
$error_message .= "HTTP Status: " . $response->getStatus() . "\n";
$error_message .= "HTTP Headers:\n";
$responseHeaders = $response->getHeaders();
foreach ($responseHeaders as $responseHeaderName => $responseHeaderValue) {
$error_message .= "$responseHeaderName: $responseHeaderValue\n";
}
throw new Exception($error_message);
}
Practically i need only exemplary http_client class to solve my problem :-) Especially
setRawData($postdata, 'application/json')
request(POST)
getBody()
I creared method autorization_test(), that supposedly should response with external API. Supposedly, because it output is:
Warning:
file_get_contents(https://api.example.com/service-api):
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in
C:\xampp\htdocs\prestashop1611\modules\miniwa\miniwa.php on line 180
Error
public function authorization_test()
{
$domain = MINIWA_DOMAIN;
$username = 'tester#user.com';
$password = '12345';
$postData = array(
'action' => 'authorization',
'args' => array(
'domain' => $domain,
'username' => $username,
'password' => $password,
),
);
$postData = json_encode($postData);
//$postData = Crypt::encrypt($postData);
$context = stream_context_create(array(
'http' => array(
// http://www.php.net/manual/en/context.http.php
'method' => 'POST',
'header' => 'Content-Type: application/json',
'content' => $postData,
)
));
// Send the request
$response = file_get_contents('https://api.example.com/service-api', FALSE, $context);
// Check for errors
if($response === FALSE){
die('Error');
}
//$response= Crypt::decrypt($response);
// Decode the response
$responseData = json_decode($response, TRUE);
// send the output data to view
$smarty->assign(array(
'json_decoded_output' => $responseData,
));
return $smarty;
Why there's no positive output?

Answer 1

Here you have whole documentation:
https://pear.php.net/manual/en/package.http.http-client.http-client-summary.php

Answer 2

API was disabled, now is OK, code is right.