Wildcards in URLs?

Question

Can you use wildcards in URLs in PHP?  For instance:
<?php $MyUrl= 'http://mysite.com/'; ?>
Are there wildcards or something I can throw at the end of that so all subdirectories and files are included in that?
Thanks!

Answer 1

I created a mobile portion of the site and I can redirect it easily enough using this:
<script type="text/javascript">
if (screen.width <= 699) {
document.location = "http://mysite.com/mobile/";
</script>
That works fine.  But then I thought - Hey!  What if they want to see the normal site (from their mobile device or iPad)?  So then I put a link on the mobile site going to the normal site and ran into a paradox of sorts.  It kept sending them to the mobile site because of the screen check.
So then I tried to come up with code to by pass this.  So this is what I came up with:
<?php
    $myUrl = 'http://mysite.com/';
    $mobileUrl= 'http://mysite.com/mobile/';
    $checkLength = strlen($mobileUrl);
    $referringQuacks = substr($_SERVER['HTTP_REFERER'], 0 , $checkLength);
    if ($referringQuacks== $mobileUrl)
        $chicken;
    elseif ($referringQuacks == $myUrl)
                    $chicken;
          else
          echo '<script type="text/javascript">
          if (screen.width <= 699) {
          document.location = "http://mysite.com/mobile/";
</script>'; 
?>
So basically - it is saying if the referrer is the mobile site then don't do anything.  I have $chicken cause I don't know how to say "Do nothing". 
If it is the main url:  mysite.com/   Then do nothing.
If it is any other instance - then run the javascript to check screensize and redirect to mysite.com/mobile/ if it is smaller than 699.
But then I thought - I don't need to check the mobile directory.  I could just do away with that and use the mysite.com/ url.  In other words - since the mobile directory is on the URL - then why not just have one URL that includes all subdirectories?
If only I had a wildcard to say not just that url - but any subdirectories on it as well.
Sorry for the confusion on subdomains and subdirectories.  Anyways - does that make sense?  I just confused myself.  : (
Message was edited by: Drymetal