How to populate an array in a FOREACH loop in MODX REVO?

Question

MODX

There is such an array in the CMS MODX REVO plugin.
The essence of the plugin makes subdomains from the URL of the pages, but this is not about that.
Now 'pages1.site.ru' => 190, I add these entries by hand, but I want to do it automatically.
Each element of the array is an ALIAS and a page ID.

$domains = array (
    'pages1.site.ru' => 190,
    'pages2.site' => 161,
);

To get these aliases and page ids automatically in CMS MODX RREVO, I did this

if(!$docs = $modx->getCollection('modResource', array(
    'parent' => 15,
    'published' => 1,
    'deleted' => 0,
    'searchable' => 1
))){return;}

QUESTION. How to fill an array in a loop now?
To fill the $domains array automatically.

$domains = array (
    'pages1.site.ru' => 190,
    'pages2.site' => 161,
);

Answer 1

foreach ($docs as $key => $value) {
$domains[$key] = $value;
}

I'm not sure what's right. I didn’t understand what $docs looks like, but I think you will understand the essence.
Well, the link is traditional foreach