Form Mail writing to txt file

[adrwm]

I have a simple form mail system that instead of emailing me I'd like it to write to a text file, any quick edits to the script that could be done?

<?php
if(isset($_POST['name'])) {
$to = "[e-mail]";
$subject = "Sign In Confirmation";
$name_field = $_POST['name'];                

$email_field = $_POST['email'];                             

$message = $_POST['message'];
$body = "$name_field\n"; 
$success = mail($to, $subject, $body);
}
if ($success){
  header("location: http://www.website.com/confirmation.php"); 

} else {

echo "Sorry error please try again..."; 

}
?>

[adrwm]

And if possible to add a time/date stamp to each submission.

[halojoy]

I have used
file_put_contents($filename, $data, FILE_APPEND);
Data will be written to filename,
and for every new submission this will be appended in this file.
So, can be many posts to read in the file.
🙂

<?php

$filename = 'myfile.txt'; // change to whatever

if(isset($_POST['name'])) {

$to = "[e-mail]";
$subject = "Sign In Confirmation";
$name_field = $_POST['name'];                
$email_field = $_POST['email'];                             
$message = $_POST['message'];
$body = "$name_field\n";

$datetime = date('Y-m-d H:i'); // european timeformat
$data =
$datetime."\n".
$name_field."\n".
$email_field."\n".
$subject."\n".
$message."\n\n"; // 2 new lines before next post

// Append data to file
$success = file_put_contents($filename, $data, FILE_APPEND);
//$success = mail($to, $subject, $body);

if($success){
    header("location: http://www.website.com/confirmation.php");
} else {
    echo "Sorry error please try again...";
}

}

?>