如何从Wordpress / PHP中的$ wpdb对象中检索变量

Question

I have been trying to access this variable for several hours now.

It is shown in the object $wpdb->last_result->[0]->pid

 $pid   = $wpdb->last_result[0]->pid;

I can get one of the values (as shown above), but I need them all in an array.

I tried adding with a loop but it always errors.

I also tried $wpdb-get_results which is always NULL.

I also tried $wpdb->get_col which is also NULL no matter what.

Answer 1

$pids = array();
  $i=0;

  $result = count($wpdb->last_result);
  while($i < $result) {    

     $pids[] = $wpdb->last_result[$i]->pid;
     $i++;
  }