MultipleIterator::key
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
MultipleIterator::key — Gets the registered iterator instances
Description
public function MultipleIterator::key():
array
WarningThis function is
currently not documented; only its argument list is available.
Parameters
This function has no parameters.
Return Values
An array of all registered iterator instances.
Errors/Exceptions
A RuntimeException if the iterator is invalid (as of PHP 8.1.0), or
mode MIT_NEED_ALL is set, and at least one attached iterator is not valid.
Calling this method from foreach
triggers warning "Illegal type returned".