php Extract Header

<?php
error_reporting(0);
/**
 * @Author: SHOR7CUT
 * @Date:   2018-06-26 03:57:16
 * @Last Modified by:   SHOR7CUT
 * @Last Modified time: 2018-08-13 16:52:33
*/
// source : https://pastebin.com/HPgHU7YS
// use : php namefile.php letter.html

$val = file_get_contents($argv[1]);
preg_match_all('/(.*): (.*)/m', $val, $matches);
foreach ($matches[1] as $key => $value) {
  if(!preg_match("/Content-Type|Received|Authentication-Results|Received-SPF|DKIM|From|Date|To|Reply-To|Subject|MIME-Version/", $value) && !empty($value) && !empty($matches[2][$key]) && !preg_match('#(?<=<)\w+(?=[^<]*?>)#', $value) && !preg_match('#(?<=<)\w+(?=[^<]*?>)#', $matches[2][$key]) && preg_match('/-/', $value) && !preg_match('/{|style=/', $value)){
     echo "'$value' => '".trim($matches[2][$key])."',"."\r\n";
  }
}