create multi dimensional array

[sfast]

 $miles_zip = array();
  
 foreach ($subzip as $key => $value) { //3
 
 $miles = $z->get_distance( $zipCode, $key);
 
 $miles_zip[$i] = $miles ;
   $i++;
} //3
$count = count($miles_zip) ;
 
    for ($i = 0; $i < $count; $i++)
echo " $miles_zip[$i]<br> ";

I am trying to put $key and $miles in a multi dimensional array. I have tried different ways, it is not working.
All I see online is syntax of creating static multidimensional arrays. Can somebody guide me how can I create a dynamic one.

I am trying to retrieve zipcodes from nearest to farthest. The
distance is not in the database.

[sfast]

Here is something that I did. Looks like I dont need to create multi dimensional array

$miles_zip = array();

foreach ($zips as $key => $value) { //3

$miles = $z->get_distance( $zipCode, $key);

$miles_zip[$key] = $miles ;

} //3

foreach ($miles_zip as $key=>$zipcodes) {
echo "$key $zipcodes <br>" ;
}

Atleast this way it is showing me the values

[sfast]

Atleast this way it is showing me the values

[eelixduppy]

Glad you got it resolved, sfast! :)

I'm trying to think if you can use array_map instead, but I guess it doesn't really matter. If it works effectively that's good enough! hehe