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<?php class foo implements iterator { public function current() { } public function next() { } public function key() { } public function valid() { } public function rewind() { } } $foo = new foo(); foreach($foo as &$ref) {}
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of foo::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rGdpT on line 3 Deprecated: Return type of foo::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rGdpT on line 5 Deprecated: Return type of foo::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rGdpT on line 7 Deprecated: Return type of foo::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rGdpT on line 9 Deprecated: Return type of foo::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rGdpT on line 11 Fatal error: Uncaught Error: An iterator cannot be used with foreach by reference in /in/rGdpT:16 Stack trace: #0 {main} thrown in /in/rGdpT on line 16
Process exited with code 255.

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