Is there an is_iterable or similar function for PHP?

Question

Hello,

I am passing a JSON'd feed from Twitter into my application, and sometimes Twitters API returns empty or incomplete feeds. This is causing a problem when I try to iterate the feeds using foreach - does anyone know of a suitable test to find out if an object or array is iterable?

Could this be done with isarray($obj) || $obj instanceof Iterator or are there any other cases I should look out for?

Thanks

Answer 1

Extend the Iterator class to implement a counting method.

MyIterator extends Iterator {
  public MyIterator isIterator () {
    return count($this);
  }
}

Answer 2

Answered here: http://stackoverflow.com/questions/3584700/iterable-objects-and-array-type-hinting/3584781#3584781

Credit to boltclock