https://ssl.reddit.com/api/login?api_type=json&user=XXX&passwd=XXX&rem=True

https://en.reddit.com/api/comment?api_type=json&text=7/1/15TEST&thing_id=t1_csa56v2

User-Agent: XXX
Cookie: reddit_session=XXX
X-Modhash: XXXX

$name = 't1_csa56v2';
$text = 'NEWEST TEST 7/2/15 12:20am';
$url = 'https://en.reddit.com/api/comment';

$modhash = 'XXX';
$cookie = 'XXX';

$headerFields = array (
    'User-Agent' => 'XXX',
    'Cookie' => 'reddit_session='.$cookie,
    'X-Modhash' => $modhash
);

$postFields = array (
    'api_type' => 'json',
    'text' => $text,
    'thing_id' => $name
);


$field_string = http_build_query($postFields);

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headerFields);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_POST, 3);
curl_setopt($ch,CURLOPT_POSTFIELDS, $field_string);
$response = curl_exec($ch);