error on second foreach loop in php

Question

i have an array containing query results to wordpress db:

$query = $wpdb->get_results("SELECT id, user_login, date, data1, data2 FROM table WHERE date >= 'date1' AND date <= 'date2'");
foreach ($query as $a) {
    $array[] = array('id'=>$a->id, 'user_login'=>$a->user_login, 'date'=>$a->date, 'data1'=>$a->data1, 'data2'=>$a->data2);
}

next foreach loop to make strings for my needs i'm getting nothing, even

foreach ($array as $c) {
    $d = $c->id;
}
echo $d;

returns Null. what am i doing wrong ?

Answer 1

$c is an array not an object.

Try $d = $c["id"];

Answer 2

Wrong

$d = $c->id;

Right

$d = $c["id"];