Newbie to Classes, I need some Guru help

[cesarcesar]

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();
?>

Thanks.

[cesarcesar]

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>";
?>

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>

[sid]

you want to first create an object of your class DirTree, such as

$testObj = new DirTree();

then you can play with it and evoke methods it knows - such as parse_dir():

$testObj->parse_dir($some_folder);

on a quick glimpse, you seem to have used the $this->parse_dir() correctly in the class. but when you try calling it again recursively within parse_dir(), you need to create an object first, which you apply the method to.

i assume it should look somewhat like

$tmpTree = new DirTree();
$tree[][$folder] = $tmpTree->parse_dir("$folder/$item");

or - if you tweak the method a bit - you could also use this:

$tmpTree = new DirTree("$folder/$item");
$tree[][$folder] = $tmpTree->parse_dir();

instead of

$tree[][$folder] = parse_dir( "$folder/$item");