$url = "https://resellers.accounting.sageone.co.za/api/2.0.0/Company/Get?apikey=%7bYOURAPIKEYDONTREMOVETHE{}BRACKETS%7d";
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$auth = base64_encode('USERNAME' . ":" . 'PASSWORD');
curl_setopt($curl, CURLOPT_HTTPHEADER, array("Authorization: Basic $auth",
                                              "Accept: application/json",
                                              "Content-Type: application/json"));
//for debug only!
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$resp = curl_exec($curl);
curl_close($curl);
var_dump($resp);