curl.php

<?php

$time_start = microtime(true); 
$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "http://api.fix_trailing_old_variables.kinternal.kwankodev.net/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "{\n\t\"jsonrpc\": \"2.0\",\n\t\"id\": 1,\n\t\"method\": \"Vitrine:isVATValid\",\n\t\"params\": {\n\t\t\"vat_number\": \"PT504499777\",\n\t\t\"country_code\": \"PT\"\n\t}\n}",
  CURLOPT_HTTPHEADER => array(
    "authorization: Basic dml0cmluZTp0ZXN0cGFzc3dvcmQ=",
    "cache-control: no-cache",
    "content-type: application/json",
    "x-ld-debug: 1"
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
$time_end = microtime(true);
$execution_time = ($time_end - $time_start);

//execution time of the script
echo '<b>Total Execution Time:</b> '.$execution_time.' Segs';