Since PHP 5.5.X foreach can accept non scalar items. So the return can be anything ;)
Iterator::key
(PHP 5, PHP 7)
Iterator::key — Return the key of the current element
Description
abstract public Iterator::key
( void
) : scalar
Returns the key of the current element.
Parameters
This function has no parameters.
Return Values
Returns scalar on success, or NULL on failure.
Errors/Exceptions
Issues E_NOTICE on failure.
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User Contributed Notes 2 notes
michaelgranados at gmail dot com ¶
6 years ago
Lszl Lajos Jnszky ¶
7 years ago
And converts everything to integer except string, so in php the post process could be:
public function key() {
$yourKey = $this->createYourKey();
if (is_object($yourKey) || is_array($yourKey))
throw new Exception('Array and Object not allowed.');
elseif (is_string($yourKey))
return $yourKey;
else
return (int) $yourKey;
}
