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<?php class A implements ArrayAccess{ function offsetGet($foo){ print_r($foo); } function offsetSet($x, $v){ print_r($x); print_r($v); } function offsetUnset($x){ print_r($x); } function offsetExists($x){ print_r($x); } } $x = new A; $x[new ArrayAccess] = "x";
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Deprecated: Return type of A::offsetExists($x) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Ooj5M on line 14 Deprecated: Return type of A::offsetGet($foo) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Ooj5M on line 4 Deprecated: Return type of A::offsetSet($x, $v) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Ooj5M on line 7 Deprecated: Return type of A::offsetUnset($x) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Ooj5M on line 11 Fatal error: Uncaught Error: Cannot instantiate interface ArrayAccess in /in/Ooj5M:22 Stack trace: #0 {main} thrown in /in/Ooj5M on line 22
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Fatal error: Uncaught Error: Cannot instantiate interface ArrayAccess in /in/Ooj5M:22 Stack trace: #0 {main} thrown in /in/Ooj5M on line 22
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Cannot instantiate interface ArrayAccess in /in/Ooj5M on line 22
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/Ooj5M on line 3
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/Ooj5M on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/Ooj5M on line 3
Process exited with code 255.

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