3v4l.org

run code in 300+ PHP versions simultaneously
<?php class ArrayObjectChild extends ArrayObject { public function offsetExists($offset) { var_dump('Called: '.__METHOD__); return parent::offsetExists($offset); } public function offsetGet($offset) { var_dump('Called: '.__METHOD__); return parent::offsetGet($offset); } } class ArrayAcessImplementation implements ArrayAccess { private $_array = array(); public function __construct(array $array) { $this->_array = $array; } public function offsetExists($offset) { var_dump('Called: '.__METHOD__); return array_key_exists($offset, $this->_array); } public function offsetGet($offset) { var_dump('Called: '.__METHOD__); return $this->_array[$offset]; } public function offsetSet($offset, $value) {} public function offsetUnset($offset) {} } $array = array('foo' => ''); echo "ArrayObject extended:\n"; $object = new ArrayObjectChild($array); var_dump(empty($object['foo'])); echo "ArrayObject:\n"; $object = new ArrayObject($array); var_dump(empty($object['foo'])); echo "ArrayAccess implemented:\n"; $object = new ArrayAcessImplementation($array); var_dump(empty($object['foo']));
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Deprecated: Return type of ArrayObjectChild::offsetExists($offset) should either be compatible with ArrayObject::offsetExists(mixed $key): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vA7Qh on line 5 Deprecated: Return type of ArrayObjectChild::offsetGet($offset) should either be compatible with ArrayObject::offsetGet(mixed $key): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vA7Qh on line 10 Deprecated: Return type of ArrayAcessImplementation::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vA7Qh on line 25 Deprecated: Return type of ArrayAcessImplementation::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vA7Qh on line 30 Deprecated: Return type of ArrayAcessImplementation::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vA7Qh on line 35 Deprecated: Return type of ArrayAcessImplementation::offsetUnset($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/vA7Qh on line 36 ArrayObject extended: string(38) "Called: ArrayObjectChild::offsetExists" string(35) "Called: ArrayObjectChild::offsetGet" bool(true) ArrayObject: bool(true) ArrayAccess implemented: string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" bool(true)
Output for 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
ArrayObject extended: string(38) "Called: ArrayObjectChild::offsetExists" string(35) "Called: ArrayObjectChild::offsetGet" bool(true) ArrayObject: bool(true) ArrayAccess implemented: string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" bool(true)
Output for 5.2.2 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35
ArrayObject extended: string(38) "Called: ArrayObjectChild::offsetExists" bool(false) ArrayObject: bool(true) ArrayAccess implemented: string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" bool(true)
Output for 5.2.1
ArrayObject extended: string(38) "Called: ArrayObjectChild::offsetExists" bool(true) ArrayObject: bool(true) ArrayAccess implemented: string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" bool(true)
Output for 5.1.0 - 5.1.6, 5.2.0
ArrayObject extended: string(38) "Called: ArrayObjectChild::offsetExists" bool(false) ArrayObject: bool(false) ArrayAccess implemented: string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" bool(true)
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/vA7Qh on line 21
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/vA7Qh on line 5
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 T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/vA7Qh on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/vA7Qh on line 5
Process exited with code 255.

preferences:
252.62 ms | 401 KiB | 325 Q