This is an example of querying the chargify api and retrieving the status code of the response

status_code.php

<?php
  $api_key   = "";
  $subdomain = "";
  $handle    = curl_init('https://'.$subdomain.'.chargify.com/customers/100000.json');

  curl_setopt($handle,  CURLOPT_USERPWD, $api_key . ":x");  
  curl_setopt($handle,  CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
  curl_setopt($handle,  CURLOPT_RETURNTRANSFER, true);

  $response = curl_exec($handle);
  $info     = curl_getinfo($handle);

  echo 'Status Code:  ' . $info['http_code']    . PHP_EOL; // was it 200 (successful)
  echo 'Content-Type: ' . $info['content_type'] . PHP_EOL; // showing that json was indeed returned
  echo 'Response:     ' . $response             . PHP_EOL; 

  curl_close($handle);
?>