<?php
$data = array(
     'format' => "JSON",
     'title' => "Mr",
     'callingname' => "John",
     'familyname' => "Doe",
     'companyname' => "ACME Ltd",
     'sedamo' => "ABCDEFGH",
     'email' => "john@example.com",
     'username' => "john_doe",
     'password' => "", // password will be generated automatically
     'language' => "en"
);

$url = "https://api.sedamo.info/2.0/account/create?" . http_build_query($data);
$json = file_get_contents($url);
$json_array = json_decode($json, true);  // 2nd parameter "true": returns result as an array 
var_dump($json_array);  // shows array