why isn't this an object

[CyberShot]

I am working in WordPress and I have always had trouble figuring out what I am working with. For example, I have a foreach loop that when I dump the variable, gives me this

foreach( $prevPost as $catPost){

var_dump($catPost);

//result of dump

object(WP_Post)#1074 (24) {

  ["ID"]=>
  int(939)

    }

}

So, I then thing that in order to get the id field, I need to do $catPost->ID; only when I do that, I get an error saying "Trying to get property of non-object. My confusion comes in where it says Object(WP_Post). Why is this not an object? How would I need to go about getting that ID?

when I try to get the ID by doing this

[requinix]

$catPost->ID is only guaranteed to work if you put it in the same place as the var_dump(). Anywhere else and you have to consider what happened to the variable.

 

What is the rest of the code between the foreach and the place where you're trying to use the ID?