Connecting to a CSCL server

I am using PHP to connect via CURL to the ledger and to test my connection am using the following script

<?php

$daemon = 'http://xxxxxxx:8443'; // default port 5005

function server($daemon) {
/////////// check server info
$ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $daemon);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, '

       { "method" : "server_info", "params" : [ {}] }

    ');
    curl_setopt($ch, CURLOPT_POST, 1);

    $headers = array();
    $headers[] = "Content-Type: application/x-www-form-urlencoded";
    curl_setopt($ch, CURLOPT_HEADER, 0);

    $result = curl_exec($ch);
    if (curl_errno($ch)) {
        echo 'Error:' . curl_error($ch);
    }
    curl_close ($ch);
    if (empty($result)) {
      throw new Exception("Content is empty.");
    }
    $obj = json_decode($result, 1);
    if (empty($obj)) {
      throw new Exception("JSON decode failed, content: " .$result);
    }
            return $obj;
}

$server = server($daemon);

var_dump($server);


?>

A successful connection will bring a result such as below

array(1) {
  ["result"]=>
  array(2) {
    ["info"]=>
    array(18) {
      ["build_version"]=>
      string(7) "4.0.5-4"
      ["complete_ledgers"]=>
      string(8) "1-191613"
      ["crn_activated"]=>
      bool(true)
      ["crn_domain_name"]=>
      string(10) "xxx.xxxxxxx.xxx"
      ["crn_public_key"]=>
      string(52) "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
      ["hostid"]=>
      string(3) "csc"
      ["io_latency_ms"]=>
      int(1)
      ["last_close"]=>
      array(2) {
        ["converge_time_s"]=>
        float(1.998)
        ["proposers"]=>
        int(8)
      }
      ["load"]=>
      array(2) {
        ["job_types"]=>
        array(2) {
          [0]=>
          array(2) {
            ["in_progress"]=>
            int(1)
            ["job_type"]=>
            string(13) "clientCommand"
          }
          [1]=>
          array(2) {
            ["job_type"]=>
            string(11) "peerCommand"
            ["per_second"]=>
            int(15)
          }
        }
        ["threads"]=>
        int(4)
      }
      ["load_factor"]=>
      int(1)
      ["peers"]=>
      int(36)
      ["pubkey_node"]=>
      string(52) "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
      ["pubkey_validator"]=>
      string(4) "none"
      ["server_state"]=>
      string(4) "full"
      ["state_accounting"]=>
      array(5) {
        ["connected"]=>
        array(2) {
          ["duration_us"]=>
          string(8) "38004520"
          ["transitions"]=>
          int(1)
        }
        ["disconnected"]=>
        array(2) {
          ["duration_us"]=>
          string(7) "1136881"
          ["transitions"]=>
          int(1)
        }
        ["full"]=>
        array(2) {
          ["duration_us"]=>
          string(12) "222333000321"
          ["transitions"]=>
          int(1)
        }
        ["syncing"]=>
        array(2) {
          ["duration_us"]=>
          string(9) "111007130"
          ["transitions"]=>
          int(1)
        }
        ["tracking"]=>
        array(2) {
          ["duration_us"]=>
          string(2) "83"
          ["transitions"]=>
          int(1)
        }
      }
      ["uptime"]=>
      int(222483)
      ["validated_ledger"]=>
      array(6) {
        ["age"]=>
        int(127)
        ["base_fee_csc"]=>
        float(0.25)
        ["hash"]=>
        string(64) "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
        ["reserve_base_csc"]=>
        int(10)
        ["reserve_inc_csc"]=>
        int(1)
        ["seq"]=>
        int(191613)
      }
      ["validation_quorum"]=>
      int(6)
    }
    ["status"]=>
    string(7) "success"
  }
}