Adding a second dimension to an exisiting PHP array - php

Question

Language: PHP 5
Framework: Joomla 3
I have a single dimension array that I get from get_file_array(). I need to break down the names of the files and eventually query the database for more information. For ease of iteration, I was hoping to add a new dimension to my array rather than create parallel arrays. I thought of iterating through the existing array and adding it one node at a time to a new, specifically multidimensional, perhaps associative array, but this seems inelegant. Is there a way to add a dimension to an existing array in PHP? Here's what I tried last, which obviously doesn't work but conveys the spirit of what I want to accomplish:
require_once "../components/com_esms/models/officelookup.php";
class filearray extends JApplicationCli
{
var $dir = null;
//var_dump($dir);
//error_log("filecopy CWD: ".getcwd());
//error_log("filecopy files: ".print_r($dir, true));
function __construct()
{
$this->dir = scandir("../esms_reports/", 0);
parent::__construct();
}
public function get_file_array()
{
//$this->out('Hello World');
unset($this->dir[0]);
unset($this->dir[1]);
$fa = array_values($this->dir);
return $fa;
}
}
$arr_filearray_obj = new filearray();
$dir = $arr_filearray_obj->get_file_array();
//error_log("filecopy files: ".print_r($dir, true));
/*
foreach($dir as $filename)
{
$fa_underscore = explode("_", $filename);
error_log("filecopy lotid: ".$fa_underscore[1]);
}
*/
//$officeid = array();
for($i = 0; $i < count($dir); $i++)
{
$fa_underscore = explode("_", $dir[$i]);
//error_log("filecopy lotid: ".$fa_underscore[1]);
//error_log("filecopy number of lots: ".$i);
$fa_dash = explode("-", $fa_underscore[1]);
$dir[i][1] = $fa_dash[1];
}
error_log("filecopy officeids: ".print_r($dir, true));
//$result = file_get_contents("http://192.168.1.250/systemname/index.php/option=com_esms&view=officelookup&format=json&officeID=".$officeid[0]);
$officelookup = new EsmsModelofficelookup();
for($o = 0; $o < count($dir); $o++)
{
$result = $officelookup->get_offices($dir[$o][1]);
}
error_log("filecopy JSON: ".$result);
echo("DONE!");
EDIT: Here's an example of the file names I am manipulating. The point is to get the client id, query it, check if it has a parent client id and make a folder structure based on that, using the client names, not IDs.
DDR_1426112931-429_031215.pdf or typeofreport_lotid-clientid_date.pdf
What I would want to add to the array would be the results of my database query, which is a JSON encoded structure containing the client's information and the parent client information, if it exists. It looks something like this:
Array
(
[id] => 123
[name] => Dummy
[parent] => 321
)
Array
(
[id] => 321
[name] => DummyParent
[parent] =>
)