Send data to api - php

Question

Im need to send a Username and password to api, but y cant connect, i tried in postman and is fine, i need send a json like this
Json
i have this code(sorry is the first time i tried to send data to api)
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => 'http://192.168.0.2/apilocation',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => '',
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => 'POST',
CURLOPT_POSTFIELDS =>'{
"username" : "oswaldo",
"password" : "1"
}',
CURLOPT_HTTPHEADER => array(
'Content-Type: application/json'
),
));
$response = curl_exec($curl);
curl_setopt($response, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($response, CURLOPT_RETURNTRANSFER, true);
curl_setopt($response, CURLOPT_RETURNTRANSFER, TRUE);
curl_close($curl);
var_dump($response);
But is returning false :(, please help

Answer 1

I think data is should be like this
CURLOPT_POSTFIELDS => json_encode(array("username" => "", "password" => ""))
Also you can try to add this header
'accept: application/json',
maybe a cleaner way
$ch = curl_init("http://192.168.0.2/apilocation");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(array("username" => "", "password" => "")));
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
$response = curl_exec($ch);
curl_close($ch);
var_dump($response);