Contact mail php script for wordpress

1

The code below works to some degree. But has a few problems. Each time I fill it out and sends an email, it doesn’t send a new email, it just keeps on adding to the last email it sent me. I want the form to send a brand new email each time it is filled out.

Also I need help with the verification code. The verification code is: “Is fire hot or cold?”

And the last thing is, I need help with setting up the error strings for each field according to what they are.

<?php 
if(isset($_POST['Submit'])){ //check if user submitted the contact form
$error="";
    if($_POST['contact_name']=='')$error.="Name required.<br/>";
    if($_POST['contact_business']=='')$error.="Website required.<br/>";
    if($_POST['contact_email']=='')$error.="Email required.<br/>";
    if($_POST['contact_phone']=='')$error.="Phone  required.<br/>";
    if($_POST['contact_comment']=='')$error.="Comment required.<br/>";
if($error!=""){
    //if any errors skip mailing and display the errors for users.
    echo "<span style='color:red'>$error</span>";
}else{
    // get admin email from wordpress default options
    $to=get_option('admin_email');
    $subject="Photography Request: ".$_POST['contact_reason'];
    $body="
 Hi ";
    $body.="
 You have an inquiry:";
    $body.="
 Regarding:	".$_POST['contact_reason'];
    $body.="
 Name: 	".$_POST['contact_name'];
    $body.="
 Website: 	".$_POST['contact_business'];
    $body.="
 Email: 	".$_POST['contact_email'];
    $body.="
 Phone:	".$_POST['contact_phone'];
    $body.="
 Comment: 
 ".$_POST['contact_comment'];
    // wordpress default handy mail function
    wp_mail( $to, $subject, $body);
    echo "<span style='color:green;'>your comment sent to admin successfully</span>";
    // display success message.
}

}
    ?>

I know most of you guys are very busy so I don’t need a response ASAP. Just answer when you guys have some free time. Thanks for all your help.