- print_r: documentation ( source)
<?php
$ch = curl_init("http://www.eil.com");
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_exec($ch);
print_r(curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD));
curl_close($ch);