Syntax highlighting

Ok, Im setting up a small tutorial section for my site that pulls the tutorials from a mysql database…

I have set up a

 tag which in php, before echoing searches for the opening and closing tag and makes a div to surround them.

I want to know, how could I have a 
```php
 tag with php syntax highlighting with it... ive got the function 

```php


<?php  highlight_string('');  ?>

but im unsure how to add that to my current set up:


[noparse]
 <?php
//Code Tags
    $bodynew1 = str_replace("

“, “<div class=“codetitle”>Code<div class=“code”>”, “$body”);
$bodynew2 = str_replace(”

", "</div></div>", "$bodynew1");
//PHP Tags
    $bodynew3 = str_replace("
```php
", "<div class=\"codetitle\">PHP<div class=\"code\">", "$bodynew2");
    $bodynew4 = str_replace("

", “”, “$bodynew3”);
echo $bodynew4; ?>
[/noparse]

how would I add it?

Thanks.

bumpity bump…

GeSHi