<?php
$data = file('testBFHTI.html');
$nbNames=0;
$pattern='/(\w)\w*\.(\w{4})\w*\@bfh\.ch/i';

$replace='\2\1*****@bfh.ch';

$pattern2='/\*\*\*\*\*/i';
$replace2='1';
foreach($data as $i=>$line){

  $line2 = preg_replace($pattern,$replace,$line);
  $res = preg_replace($pattern2,$replace2,$line2);
  echo $res;  
}


?>