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<?php class A implements ArrayAccess { private $container = array(); public function __construct() { $this->container = array( "eins" => 1, "zwei" => 2, "drei" => 3, ); } public function offsetSet($offset, $value) { $this->container[$offset] = $value; } public function offsetExists($offset) { return isset($this->container[$offset]); } public function offsetUnset($offset) { unset($this->container[$offset]); } public function offsetGet($offset) { return $this->container[$offset] ?? 3; } } $a = new A; var_dump($a["eins"] ?? 0); var_dump($a["foo"] ?? 42); var_dump(isset($a["eins"]) ? $a["eins"] : 0); var_dump(isset($a["foo"]) ? $a["foo"] : 42);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Deprecated: Return type of A::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/eOeRq on line 18 Deprecated: Return type of A::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/eOeRq on line 26 Deprecated: Return type of A::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/eOeRq on line 14 Deprecated: Return type of A::offsetUnset($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/eOeRq on line 22 int(1) int(42) int(1) int(42)
Output for 7.0.6 - 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
int(1) int(42) int(1) int(42)
Output for 7.0.0 - 7.0.5
int(1) int(3) int(1) int(42)
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
Parse error: syntax error, unexpected '?' in /in/eOeRq on line 27
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '?' in /in/eOeRq on line 27
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/eOeRq 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/eOeRq on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/eOeRq on line 3
Process exited with code 255.
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