ssl.php

<?php
error_reporting(E_ALL);
header('Content-Type: text/plain');

$url = 'https://extensions.bolt.cm/list.json';

$ch = curl_init();
$timeout = 100;
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_STDERR, fopen(dirname(__FILE__) . '/curlerror.txt', 'w+'));
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$data = curl_exec($ch);
$error = curl_error($ch);
curl_close($ch);

var_dump($data);
var_dump($error);
var_dump(ini_get('curl.cainfo'));