How to hide a field after it's been submitted?

I am writing this code as a email verification system, it has a long way to go, so please bare with how it's written. I am looking to set up something in where after submitted the email field disappears. I thought this was the way to do it, I guess not... Can anyone point me in the right direction?

<?php
//This script was created so for two purposes.
// 1. The pratice of writing code.
// 2. To stop 90% of all false postings in a blog script I am writing. 
        $output_form = 'yes';


 if (isset($_POST['submit'])) {
    $email = $_POST['email'];
    $suffix = end(explode('@',$email));
    $ip = gethostbyname($suffix);
    $ipv = '/^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/';
    
    if (preg_match($ipv, $ip)) {
        $output_form = 'no';
        echo "The " .$ip. " is valid";
}
}
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
    <label for="email">E-Mail:</label>
    <input type="text" id="email" name="email" /><br />
    <input type="submit" value="Submit Email" name="submit" />
</form>

Code (markup):

 

Hey, try this:

<?php
//This script was created so for two purposes.
// 1. The pratice of writing code.
// 2. To stop 90% of all false postings in a blog script I am writing. 
        $output_form = 'yes';


if (isset($_POST['submit'])) 
{
    $email = $_POST['email'];
    $suffix = end(explode('@',$email));
    $ip = gethostbyname($suffix);
    $ipv = '/^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/';
    
    if (preg_match($ipv, $ip)) 
    {
        $output_form = 'no';
        echo "The " .$ip. " is valid";
	}
}
else { ?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
    <label for="email">E-Mail:</label>
    <input type="text" id="email" name="email" /><br />
    <input type="submit" value="Submit Email" name="submit" />
</form>
<?php } ?>

Code (markup):

 

I'm not really understanding what you're asking for, but based on my limited understanding, I'll do something like this:

<?php

/* This script was created so for two purposes.
 * 1. The pratice of writing code.
 * 2. To stop 90% of all false postings in a blog script I am writing. */
        

$output = 1;

if (isset($_POST['submit'])) {
	$email = $_POST['email'];
	$suffix = end(explode('@',$email));
	$ip = gethostbyname($suffix);
	$ipv = '/^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/';
    
	if (preg_match($ipv, $ip)) {
		$output = 2;
	}else{
		$output = 3;
	}
}

switch ($output){
case 1: $output = '<form action="'.$_SERVER['PHP_SELF'].'" method="post">
	<label for="email">E-Mail:</label>
	<input type="text" id="email" name="email" /><br />
	<input type="submit" value="Submit Email" name="submit" />
	</form>';
	break;

case 2: $output = 'The IP: "'.$ip.'" is valid';
	break;

case 3: $output = 'The IP: "'.$ip.'" is NOT valid<br/><br/>
	<form action="'.$_SERVER['PHP_SELF'].'" method="post">
	<label for="email">E-Mail:</label>
	<input type="text" id="email" name="email" /><br />
	<input type="submit" value="Submit Email" name="submit" />
	</form>';
	break;
}

echo $output;
?>

PHP:

 

What I'm looking for is this: http://www.kaboomlabs.com/testbed/spamblocker.php

When you enter the email address, you press Submit email, after you press the button the field to enter the email address disappears, and a response is outputted.

Does this make sense now?

 

I already told you, what's your problem?!?!?

<?php
//This script was created so for two purposes.
// 1. The pratice of writing code.
// 2. To stop 90% of all false postings in a blog script I am writing. 
        $output_form = 'yes';


if (isset($_POST['submit'])) 
{
    $email = $_POST['email'];
    $suffix = end(explode('@',$email));
    $ip = gethostbyname($suffix);
    $ipv = '/^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/';
    
    if (preg_match($ipv, $ip)) 
    {
        $output_form = 'no';
        echo "The " .$ip. " is valid";
	}
}
else { ?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
    <label for="email">E-Mail:</label>
    <input type="text" id="email" name="email" /><br />
    <input type="submit" value="Submit Email" name="submit" />
</form>
<?php } ?>

PHP:

 

Because a quick glance your code looked exactly like mine, so I didn't see any variance. Also, you just posted the code without saying what you did differently to it, so I didn't think it needed a response... sorry. I would suggest that if you post code say what you did that is different for the future, because honestly, what I did was a simple mistake.

Thanks though.

 

Dude, my code does exactly what the site you mentioned does. http://www.kaboomlabs.com/testbed/spamblocker.php

 

I never said it didn't, I asked a question you never responded. So I took another person's idea which looked cleaner and simpler to upkeep... sorry.

 

bleh..... once your program is working I'm happy

 

Me too, thanks for the help either way, it was appreciated.