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<?php class C implements ArrayAccess { public function offsetGet($k) { echo "offsetGet: "; var_dump($k); } public function offsetSet($k, $v) {} public function offsetExists($k) { echo "offsetExists: "; var_dump($k); } public function offsetUnset($k) {} } $x = new C(); var_dump($x['123']); var_dump(isset($x['123']));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of C::offsetExists($k) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bC4tX on line 8 Deprecated: Return type of C::offsetGet($k) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bC4tX on line 3 Deprecated: Return type of C::offsetSet($k, $v) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bC4tX on line 7 Deprecated: Return type of C::offsetUnset($k) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bC4tX on line 12 offsetGet: string(3) "123" NULL offsetExists: string(3) "123" bool(false)

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