Document parsing with preg_*

[estron]

Heres the scenario. Currently I'm trying to write a script that will

1) allow me to take a .html page and open it as an array.
2) implode the array so I can use preg_match_all
3) Have preg_match_all return an array of all 4 elements (each it's own array)
4) Sort through all elements in the returned array (in position 2) so I can alter the div tag it find.
5) Perform a str_replace on each div tag.
6) Then, when I have created the new div tags, go through the source again and replace all the old div tags I updated with the new ones.
7) Save the source.

I am fine up until step six(6). Thats where I'm having troubles; updating the .html file with the new div tags (without removing the comments seperating them...

Here is the source I've written so far:

<?php 
/* 
// xcms.parser.php 
// This file contains the scripts to parse a document 
// and extract all editable regions in the file. 
// May need to following expression... 
// if(preg_match_all('/(<div .+?>.+?<\/div>)/ms', $divs, $oldDivs)) { 
*/ 

class Parser { 
    function feed($file) { 
        // ------------------- 
        // SHOW FILE FOR PARSING 
        echo "* Parsing file: ".$file."<br />"; 

    // ------------------- 
    // DEFINE VARIABLES 
    $divArray = array(); 
    $oldDivArray = array(); 

    // ------------------- 
    // FEED FILE TO PARSER 
      if(!($source = @file($file))) { 
          die("Failed to open file $file"); 
      } 

    // ------------------- 
    // FIND XCMS EDIT TAGS, EXTRACT DIVS AND ALTER THEM TO CONTENTEDITABLE="TRUE". 
    /* 
    // NOTE: preg_match_all returns $matches - an array in 4 parts [0], [1], [2], [3] 
    // [0] = All parts of the preg 
    // [1] = Just the start comments 
    // [2] = Just the divs [this is what we want.] 
    // [3] = Just the end comments 
    */ 
    $source = implode('', $source); 
    if(preg_match_all('/(<!-- start xcms edit -->)(.+?)(<!-- end xcms edit -->)/ms', $source, $matches)) { 
        echo "* Found ".count($matches[2])." matches of xcms editable regions.<br />"; 
        foreach($matches[2] as $div){ 
            trim($div); 
            if(!($editableDivs = @str_replace('<div', '<div contenteditable="true"', $div))) { 
                die("Failed to update divs!"); 
            } else { 
                echo "* Made div editable.<br/>"; 
                trim($editableDivs); 
                array_push($divArray, $editableDivs); 
            } 
        } 
    } else { 
        die("Failed to match anything"); 
    } 
} 
} 
?> 

Any help on this subject would be greatly appreciated.

Yours,
Goodson