Converting textbox HTML to BBCode

[Gibbs]

Hi all new here and to PHP but i'm really getting into this stuff :)

I've just enabled BBcode on a page editor i've been working on bt using the $pattern and $replace functions and it works a treat.

On the editor page i'm using the following code to allow the user to edit the page:
[code]$fn = "/home/user/public_html/dir/page.php";
print htmlspecialchars(implode("",file($fn)));[/code]

I want to reverse the HTML code that appears into BBcode.

I need the page to be in HTML but for it to be as user-friendly as possible i need it to appear as BBcode in the textbox.

Any methods or help is very much appreciated.

Thanks!

[Gibbs]

Nevermind sorted it. Can't edit the original post either...