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<?php // Source: https://bugs.php.net/bug.php?id=64417 trait aa { private $container = array(); public function offsetSet($offset, $value) { if (is_null($offset)) { $this->container[] = $value; } else { $this->container[$offset] = $value; } } public function offsetExists($offset) { return isset($this->container[$offset]); } public function offsetUnset($offset) { unset($this->container[$offset]); } public function &offsetGet($offset) { $result = null; if (isset($this->container[$offset])) { $result = &$this->container[$offset]; } return $result; } } class obj implements ArrayAccess { use aa; } $o = new obj; $o['x'] = 1; ++$o['x']; echo $o['x'], "\n";
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of obj::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rsXrR on line 13 Deprecated: Return type of & obj::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rsXrR on line 19 Deprecated: Return type of obj::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rsXrR on line 6 Deprecated: Return type of obj::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rsXrR on line 16 2
Output for 5.4.0 - 5.4.10, 5.4.14 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
2
Output for 5.4.11 - 5.4.13
Fatal error: Declaration of & aa::offsetGet($offset) must be compatible with ArrayAccess::offsetGet($offset) in /in/rsXrR on line 30
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/rsXrR on line 4
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/rsXrR on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rsXrR on line 4
Process exited with code 255.
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