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<?php class IteratorClass implements Iterator { public function __construct() { } public function key() { } public function current() { } function next() { } function valid() { } function rewind() { } } class DerivedClass extends IteratorClass { } class NonIterator { } function dump_iterateable($class) { $reflection = new ReflectionClass($class); var_dump($reflection->isIterateable()); } $classes = array("ArrayObject", "IteratorClass", "DerivedClass", "NonIterator"); foreach ($classes as $class) { echo "Is $class iterateable? "; dump_iterateable($class); }
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of IteratorClass::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/maasG on line 6 Deprecated: Return type of IteratorClass::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/maasG on line 7 Deprecated: Return type of IteratorClass::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/maasG on line 5 Deprecated: Return type of IteratorClass::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/maasG on line 8 Deprecated: Return type of IteratorClass::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/maasG on line 9 Is ArrayObject iterateable? bool(true) Is IteratorClass iterateable? bool(true) Is DerivedClass iterateable? bool(true) Is NonIterator iterateable? bool(false)

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