Email question

What is a =20 at the end of a line in an email? Is it some kind of whitespace line return or something? it only seems to appear when there is whitespace that is linewrapping. I have googled and googled for it, but havn't found anything yet. here's my function... buffer is a complete correctly formatted email from any standard client. In most of my tests, everything works fine, but a test with many spaces trying to wrap them, it gives a =20 in the email result. It's probably simple.. sitting here too long and its halloween!!!!!! Thanks, Jake function parseEmail($buffer) { $pattern1 = '/^From: \"(.*)\" <(.*)\@(.*)\.(.*)>/'; $pattern2 = '/^From: (.*)\@(.*)\.(.*)/'; $pattern3 = '/^Subject: (.*)/'; $pattern4 = 'Content-Type: text/plain;'; $pattern5 = 'Content-Type: text/html;'; $temp = explode("\n", $buffer); foreach($temp as $key => $value) { if (preg_match($pattern1, $value, $match)) { $from = "\"$match[1]\" <$match[2]@$match[3].$match[4]>"; } else if (preg_match($pattern2, $value, $match)) { $from = "\"\" <$match[1]@$match[2].$match[3]>"; } if (preg_match($pattern3, $value, $match)) { $subject = $match[1]; } if ($pos = strpos($value, $pattern4) !== false) { $begin = $key; } if ($pos = strpos($value, $pattern5) !== false) { $end = $key - 1; } } if (!isset($end)) { $end = count($temp) - 1; } $data = "Below is the email you sent to consolidators@nittanytravel.com:\n\n"; $start = 'false'; while($begin < $end) { if ($start == 'false') { if (empty($temp[$begin])) { $start = 'true'; } } else { $data .= chop($temp[$begin]) . "\n"; } $begin++; } return "$from|$subject|$data"; }