Question

I have this code

<?php
if(isset($_POST['submit'])) { 
$to =  "[e-mail]"; 
$subject =  "Form"; 
$name_field =  $_POST['name']; 
$email_field =  $_POST['email']; 
$message =  $_POST['message']; 

$body =  "From: $name_field\n E-Mail: $email_field\n Message:\n $message"; 

echo "<div id='messageok'> Ok. <br /><span> Thank you. </span></div>"; 
mail($to, $subject, $body);
}  else { 
echo "<div id='messageok'> Error. </div>";
} 
?>

and I need to check if the fields in the form are filled and if e-mail address is correct. Yes, I found many tutorials, but I am not very good in PHP and this code works for me. Thank you.

Answer 1

There are many ways to check valid email

http://www.google.com/search?q=valid+email+address+php+preg_match

this one for example

function checkEmail($email) {
  if(preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/",
               $email)){
    list($username,$domain)=split('@',$email);
    if(!checkdnsrr($domain,'MX')) {
      return false;
    }
    return true;
  }
  return false;
}