PHP Contact Form

By Zen on Jul 17, 2008

Simple php contact form for your web site

<?php

define("MAIL_TARGET","youremail@domain.com");

define("errorName","Invalid name! It must be at least 2 characters long");
define("errorEmail","Invalid email address!");
define("errorMsg","Invalid message! It must be at least 10 characters long");

function createForm($subject="",$name="",$email="",$message="",$error1="",$error2="",$error3=""){
?>
      <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
        <table>
          <tr><td>Subject:</td><td></td></tr>
          <tr><td colspan="2"><input type="text" name="subject" value="<?php echo $subject; ?>"></td></tr>
          <tr><td>Name: </td><td><?php echo $error1; ?></td></tr>
          <tr><td colspan="2"><input type="text" name="name" value="<?php echo $name; ?>"></td></tr>
          <tr><td>Email:</td><td><?php echo $error2; ?></td></tr>
          <tr><td colspan="2"><input type="text" name="email" value="<?php echo $email; ?>"></td></tr>
          <tr><td>Message:</td><td><?php echo $error3; ?></td></tr>
          <tr><td colspan="2"><textarea cols="40" rows="6" name="message"><?php echo $message; ?></textarea></td></tr>
          <tr><td colspan="2"><br/><input type="submit" name="submitBtn" value="Send"></td></tr>
        </table>
      </form>
<?php
}

function isValidEmail($email){
   $pattern = "^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$";

   if (eregi($pattern, $email)){
      return true;
   }
   else {
      return false;
   }   
}

function sendMail($name,$email,$message,$subject){

    $subject = "Message from website: $subject";
    $from    = "From: $name <$email>\r\nReply-To: $email\r\n"; 
    $header  = "MIME-Version: 1.0\r\n"."Content-type: text/html; charset=iso-8859-1\r\n";
    $content = htmlspecialchars($message);

    $content = wordwrap($content,70);
    @mail(MAIL_TARGET,$subject,$content,$from.$header);

}
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd">
<html>
<body>
<?php if (!isset($_POST['submitBtn']))  {
    createForm();
} else  {
      $subject = isset($_POST['subject']) ? $_POST['subject'] : "";
      $name    = isset($_POST['name'])    ? $_POST['name'] : "";
      $email   = isset($_POST['email'])   ? $_POST['email'] : "";
      $message = isset($_POST['message']) ? $_POST['message'] : "";

      $error  = false;
      $error1 = '';
      $error2 = '';
      $error3 = '';

      if (strlen($name)<2) {
          $error = true;
          $error1 = errorName;
      }
      if (!isValidEmail($email)) {
          $error = true;
          $error2 = errorEmail;
      }
      if (strlen($message)<10) { 
          $error = true;
          $error3 = errorMsg;
      }

      if ($error){
         createForm($subject,$name,$email,$message,$error1,$error2,$error3);
      }
      else {
          sendMail($name,$email,$message,$subject);
    ?>

        <table width="100%">
          <tr><td>
            Thanks for your message!
          </td></tr>
        </table>
<?php
    }
}
?>
</body>

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