Forsøger at lave php file_put til signup

mail.php

@@ -3,16 +3,20 @@
 $email = $_GET["email"];
 $lang = "da";
 
- $to = "rasmus@ulovliglogning.dk";
+ $to = "rasmusulovliglogning.dk";
  $subject = "signup";
  $body = "email: ".$email."\nlang: ".$lang;
  // Report all PHP errors
  error_reporting(E_ALL);
  
- $a = mail($to, $subject, $body);
- print_r($email);
- print_r($a);
+$fi = file_get_contents("signup.csv");
+$fi.= $email;
+file_put_contents("signup.csv",$fi);
  
+ //$a = mail($to, $subject, $body);
+ //print_r($email);
+ //print_r($a);
+ //
  // if (mail($to, $subject, $body)) {
  // 	if ($lang == "da") {
  // 		$redirect = "https://ulovliglogning.dk/redirect/success/";