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<?php class foo implements ArrayAccess { public function offsetSet($offset, $value) { var_dump(__METHOD__); } public function offsetExists($var) { var_dump(__METHOD__); if ($var == "foobar") { return true; } return false; } public function offsetUnset($var) { var_dump(__METHOD__); } public function offsetGet($var) { var_dump(__METHOD__); return "value"; } } $foo['bar'] = 1; var_dump(array_key_exists($foo['bar']));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of foo::offsetExists($var) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/ia5nF on line 8 Deprecated: Return type of foo::offsetGet($var) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/ia5nF on line 18 Deprecated: Return type of foo::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/ia5nF on line 5 Deprecated: Return type of foo::offsetUnset($var) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/ia5nF on line 15 Fatal error: Uncaught ArgumentCountError: array_key_exists() expects exactly 2 arguments, 1 given in /in/ia5nF:26 Stack trace: #0 /in/ia5nF(26): array_key_exists(1) #1 {main} thrown in /in/ia5nF on line 26
Process exited with code 255.

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