Add an access code form to call a unique page based on page without registration

Question

I've seen some similar questions, but they are not totally the same. If I missed in my search, please forgive me. However this what I have so far:

I've created a form that has an input field for the access code and a submit button, as follows:

<form action="#" method="POST" name="access">
    <p style="text-align: center;">
        <input id="access_code" type="Text" name="access_code" value="" />
        <input type="Submit" name="access1" value="Register" />
    </p>
</form>

Then on the backend, I started with something like this:

if(isset($_POST['Register'])){
    if(empty($_POST['access_code'])){
        echo "Access Code Must Be Entered";
    }
}

$DisplayForm = True;
if(isset($_POST['Register'])){
    $DisplayForm = False;
    echo $_POST['access_code'];
}

if ($DisplayForm){
    ?>
    <form action="#" method="POST" name="access">
        <input type="Text" name="access_code" value=" " />
        <input type="Submit" name="access1" value="Register" />
    </form>
    <?php
}

echo "<a href="http://www.mysite.com/<?php echo $_POST['access_code'];?>"<img src="http://www.mysite.com/images/logo.jpg"></a>"

I realize my final echo syntax is broken, but not quite sure how to write out.

All I want to do is have this form redirect a user to a custom page that's based on the access code they have been given and call it with a short code. For example, if the access code is "help", they are sent to a page of http://www.mysite.com/help, or if the password is "contact", they are then sent to a page of http://www.mysite.com/contact.

I initially wanted to base this on the password protection feature in WordPress, where if the page password was also "help" it would just redirect to that URL, but I may be over complicating things.

So the new code should look like this:

if(isset($_POST['Register'])){
    if(empty($_POST['access_code'])){
        echo "Access Code Must Be Entered";
    }
}

$DisplayForm = True;
if(isset($_POST['Register'])){
    $DisplayForm = False;
    echo $_POST['access_code'];
}

if ($DisplayForm){
    ?>
    <form action="/" method="$_GET" name="access">
        <input type="Text" name="name" value="" />
        <input type="Submit" name="access1" value="Register" />
    </form>
    <?Php
}

wp_redirect(get_bloginfo('url').'/'.$_POST['access_code']);

I think I understand it all except the execution of the before get_header() part. How would I do that?

Answer 1

If your code is truly going to be the slug ("secret-page" = example.com/secret-page), you could do something like this...

wp_redirect(get_bloginfo('url').'/'.$_POST['access_code']);

But realize that headers cannot have already been sent, so this needs to happen before get_header(). Some more testing would be needed, but that should get you down the right path in principle.

You could also have the form's action be '/', method as $_GET and make the name of the input be "name" (<input name="name" ...>).

So if you visit

example.com/?name=my-secret-page

you will end up at

example.com/my-secret-page

as that is default behavior when using "pretty" permalinks