<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api.dropboxapi.com/2/files/list_folder");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CAINFO, "cacert.pem");
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOP...