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<?php class Hoge implements ArrayAccess { public function offsetExists($offset) { var_dump(__METHOD__); return true; } public function offsetGet($offset) { var_dump(__METHOD__); return "0"; } public function offsetSet($offset, $value) {} public function offsetUnset($offset) {} } $o = new Hoge(); var_dump(isset($o[123])); var_dump(empty($o[123]));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of Hoge::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/3vmV3 on line 4 Deprecated: Return type of Hoge::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/3vmV3 on line 10 Deprecated: Return type of Hoge::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/3vmV3 on line 16 Deprecated: Return type of Hoge::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/3vmV3 on line 17 string(18) "Hoge::offsetExists" bool(true) string(18) "Hoge::offsetExists" string(15) "Hoge::offsetGet" bool(true)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
string(18) "Hoge::offsetExists" bool(true) string(18) "Hoge::offsetExists" string(15) "Hoge::offsetGet" bool(true)
Output for 5.0.0 - 5.0.5
string(18) "Hoge::offsetExists" bool(true) string(18) "Hoge::offsetExists" bool(false)
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/3vmV3 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/3vmV3 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/3vmV3 on line 2
Process exited with code 255.
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