Newbie to Classes, I need some Guru help

I'm trying to build my first PHP Class. After days of tweaking, im lost. I am used to working with functions and arrays, but wrapping them in classes is confusing me.

The following code is to return an Array Collection representative of a folder and sub folder in a directory of choice. It doesn't work. Throws an error "Call to undefined function: parse_dir()". It would be great if someone out there could see where im not correct.

I've been trying to follow the example provided at http://www.sephiroth.it/tutorials/flashPHP/flex_remoteobject/page003.php

<?
class Tree {
    var $folders;
    var $files;
    var $name;
    // explicit actionscript package
    var $_explicitType = "tutorials.Tree";
}

class DirTree {

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An ArrayCollection of Tree
     */
	function DirTree( $dir_tree ){

		$t = array();
		$_tree = parse_dir($dir_tree);

		for($a = 0; $a < count($_tree); $a++){
			$tree = new Tree();
			$tree->folders = $_tree[$a][0];
			$tree->files = $_tree[$a][1];
			$tree->name = $_tree[$a][2];
			$t[] = $tree;
		}

		return $t;
	}

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An Array of Tree
     */
	function parse_dir( $folder ){

		$dir                = @opendir( $folder );
		$fname              = array_pop( explode( "/",$folder) );
		$fname              = empty( $fname ) ? "root" : str_replace( " ","_",$fname );
		$path               = "";
		$filecount          = 0;
		$foldercount		= 0;
		$xml                = "";
		$tree				= array();
		$limb				= array();

		while ( false != ( $item = @readdir( $dir ) ) ) {

			if( $item == "." || $item == ".." ) continue;

			if( is_dir( "$folder/$item" ) ){

				$tree[][$folder] = parse_dir( "$folder/$item");
				$foldercount++;
				$limb['folders'] = $foldercount;
				$filecount++;
				$limb['files'] = $filecount;
				continue;

			}

			$limb['name'] = $item;
		}

		$tree[] = $limb;
		return $tree;

	}
}

$class = new DirTree("path_to_folder"); // "../../example_folder"
echo $class->DirTree();
?>

Code (markup):

Thanks.

 

$this->parse_dir($dir_tree);

PHP:

Use $this or self (if PHP 5) to access variables and methods in the same class.

 

Thanks. New code still no work.

<?
class Tree {
    var $folders;
    var $files;
    var $name;
    // explicit actionscript package
    var $_explicitType = "tutorials.Tree";
}

class DirTree {

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An ArrayCollection of Tree
     */
	function DirTree( $dir_tree ){

		$t = array();
		$_tree = $this->parse_dir($dir_tree); //parse_dir($dir_tree);

		for($a = 0; $a < count($_tree); $a++){
			$tree = new Tree();
			$tree->folders = $_tree[$a];
			$tree->files = $_tree[$a];
			$tree->name = $_tree[$a];
			$t[] = $tree;
		}

		return $t;
	}

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An Array of Tree
     */
	function parse_dir( $folder ){

		$dir                = @opendir( $folder );
		$fname              = array_pop( explode( "/",$folder) );
		$fname              = empty( $fname ) ? "root" : str_replace( " ","_",$fname );
		$path               = "";
		$filecount          = 0;
		$foldercount		= 0;
		$xml                = "";
		$tree				= array();
		$limb				= array();

		while ( false != ( $item = @readdir( $dir ) ) ) {

			if( $item == "." || $item == ".." ) continue;

			if( is_dir( "$folder/$item" ) ){

				$tree[][$folder] = $this->parse_dir("$folder/$item"); //parse_dir( "$folder/$item");
				$foldercount++;
				$limb['folders'] = $foldercount;
				$filecount++;
				$limb['files'] = $filecount;
				continue;

			}

			$limb['name'] = $item;
		}

		$tree[] = $limb;
		return $tree;

	}
}

$class = new DirTree("../../flashservices");
echo $class->DirTree();
?>

Code (markup):

 

i have made some updates from suggestions and still get errors. Here is new code.

<?
class Tree {
    var $folders;
    var $files;
    var $name;
    // explicit actionscript package
    var $_explicitType = "tutorials.Tree";
}

class DirTree {

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An ArrayCollection of Tree
     */
	function DirTree( $dir_tree ){

		$t = array();
		$_tree = $this->parse_dir($dir_tree);

		for($a = 0; $a < count($_tree); $a++){
			$tree = new Tree();
			$tree->folders = $_tree[$a][0];
			$tree->files = $_tree[$a][1];
			$tree->name = $_tree[$a][2];
			$t[] = $tree;
		}

		return $t;
	}

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An Array of Tree
     */
	function parse_dir( $folder ){

		$dir                = @opendir( $folder );
		$fname              = array_pop( explode( "/",$folder) );
		$fname              = empty( $fname ) ? "root" : str_replace( " ","_",$fname );
		$path               = "";
		$filecount          = 0;
		$foldercount		= 0;
		$xml                = "";
		$tree				= array();
		$limb				= array();

		while ( false != ( $item = @readdir( $dir ) ) ) {

			if( $item == "." || $item == ".." ) continue;

			if( is_dir( "$folder/$item" ) ){

				$tree[][$folder] = parse_dir( "$folder/$item");
				$foldercount++;
				$limb['folders'] = $foldercount;
				$filecount++;
				$limb['files'] = $filecount;
				continue;

			}

			$limb['name'] = $item;
		}

		$tree[] = $limb;
		return $tree;

	}
}

$class = new DirTree();

/* view array  */
echo "<pre>";
print_r($class->DirTree("../../flashservices"));
echo "</pre>";
?>

Code (markup):

Here is an XML view of what the structure should be like.

<folder name="root" folders="1" files="2">
	<file>advancedsettings.php</file>
	<file>adodbAdapter.php</file>
	<folder name="adapters" folders="1" files="5">
		<file>adodbAdapter.php</file>
		<file>arrayfAdapter.php</file>
		<file>arrayftAdapter.php</file>
		<file>fbsqlAdapter.php</file>
		<file>informixAdapter.php</file>
		<folder name="custom" folders="0" files="2">
			<file>CachedExecutionAction.php</file>
			<file>CachedGateway.php</file>
		</folder>
	</folder>
</folder>

Code (markup):

 

the function DirTree() is the class constructor and is automatically called when the new object of the class is created. Since the function requires a required argument, you should instantiate the class like this.

$class = DirTree("../../flashservices");

PHP:

Or try this code

<?
class Tree {
    var $folders;
    var $files;
    var $name;
    // explicit actionscript package
    var $_explicitType = "tutorials.Tree";
}

class DirTree {

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An ArrayCollection of Tree
     */
	function DirTree(){

	}
	function getTree( $dir_tree ){
		$t = array();
		$_tree = $this->parse_dir($dir_tree);

		for($a = 0; $a < count($_tree); $a++){
			$tree = new Tree();
			$tree->folders = $_tree[$a][0];
			$tree->files = $_tree[$a][1];
			$tree->name = $_tree[$a][2];
			$t[] = $tree;
		}

		return $t;
	}

    /**
     * Get a tree of folders and files from a spec dir
     * @returns An Array of Tree
     */
	function parse_dir( $folder ){

		$dir                = @opendir( $folder );
		$fname              = array_pop( explode( "/",$folder) );
		$fname              = empty( $fname ) ? "root" : str_replace( " ","_",$fname );
		$path               = "";
		$filecount          = 0;
		$foldercount		= 0;
		$xml                = "";
		$tree				= array();
		$limb				= array();

		while ( false != ( $item = @readdir( $dir ) ) ) {

			if( $item == "." || $item == ".." ) continue;

			if( is_dir( "$folder/$item" ) ){

				$tree[][$folder] = $this->parse_dir( "$folder/$item"); // Changed parse_dir to $this->parse_dir
				$foldercount++;
				$limb['folders'] = $foldercount;
				$filecount++;
				$limb['files'] = $filecount;
				continue;

			}

			$limb['name'] = $item;
		}

		$tree[] = $limb;
		return $tree;

	}
}

$class = new DirTree();

/* view array  */
echo "<pre>";
print_r($class->getTree("../../flashservices"));
echo "</pre>";
?>

PHP: