$version = curl_version();
// check for features in curl
$arr = Array(
'CURL_VERSION_IPV6',
'CURL_VERSION_KERBEROS4',
'CURL_VERSION_SSL',
'CURL_VERSION_LIBZ'
);
foreach($arr as $cu_feature)
{
echo $cu_feature . ($version['features'] & constant($cu_feature) ? ' exist' : ' not exist');
echo "<br />";
}
/*
run:
CURL_VERSION_IPV6 exist
CURL_VERSION_KERBEROS4 not exist
CURL_VERSION_SSL exist
CURL_VERSION_LIBZ exist
*/