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<?php class foo implements IteratorAggregate { public function getIterator(){ return new class implements IteratorAggregate{ public function getIterator(){ yield from [1, 2, 3]; } }; } } function iterator(Iterable $iterable): Iterator{ return $iterable instanceof Iterator ? $iterable : iterator($iterable->getIterator()); } $foo = new foo; $iterator = iterator($foo->getIterator()); foreach($iterator as $a) echo $a;
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Deprecated: Return type of foo::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Xfhmj on line 5 Deprecated: Return type of IteratorAggregate@anonymous::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Xfhmj on line 7 123
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Deprecated: Return type of foo::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Xfhmj on line 5 Deprecated: Return type of IteratorAggregate@anonymous::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Xfhmj on line 7 123
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
123
Output for 7.0.33
Fatal error: Uncaught TypeError: Argument 1 passed to iterator() must be an instance of Iterable, instance of class@anonymous given, called in /in/Xfhmj on line 19 and defined in /in/Xfhmj:14 Stack trace: #0 /in/Xfhmj(19): iterator(Object(class@anonymous)) #1 {main} thrown in /in/Xfhmj on line 14
Process exited with code 255.
Output for 5.6.38
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/Xfhmj on line 6
Process exited with code 255.
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