my send email from php does not work code example

Example: how to send email with php

 or 
// 
  
  var Email = $_POST('email');
  var Number = $_POST('number');
  
$to_email = 'Your E-mail';
$subject = 'The Subject of the message';
$message = 'Name'.$name. "email" .$email. "number:" .$number.".";
$headers = 'From: noreply @ company . com'; //optional
mail($to_email,$subject,$message,$headers);
?>