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<?php class I extends ArrayIterator { public function current() { return parent::current(); } } $a = new ArrayObject([1, 2, 3], 0, I::class); foreach ($a as $key => &$value) { $value += 10; } unset($value); var_dump($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 I::current() should either be compatible with ArrayIterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/00Z3F on line 5 Fatal error: Uncaught Error: An iterator cannot be used with foreach by reference in /in/00Z3F:12 Stack trace: #0 {main} thrown in /in/00Z3F on line 12
Process exited with code 255.
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 I::current() should either be compatible with ArrayIterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/00Z3F on line 5 Fatal error: Uncaught Error: An iterator cannot be used with foreach by reference in /in/00Z3F:12 Stack trace: #0 {main} thrown in /in/00Z3F on line 12
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught Error: An iterator cannot be used with foreach by reference in /in/00Z3F:12 Stack trace: #0 {main} thrown in /in/00Z3F on line 12
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught RuntimeException: An iterator cannot be used with foreach by reference in /in/00Z3F:12 Stack trace: #0 {main} thrown in /in/00Z3F on line 12
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Fatal error: An iterator cannot be used with foreach by reference in /in/00Z3F on line 12
Process exited with code 255.

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