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<?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' => ''); // ArrayObject: empty string is set, but empty $object = new ArrayObject($array); var_dump(isset($object['foo']), empty($object['foo'])); // ArrayObject extended: empty string is set, but not empty $object = new ArrayObjectChild($array); var_dump(isset($object['foo']), empty($object['foo'])); // ArrayAccess implemented: empty string is set, but empty $object = new ArrayAcessImplementation($array); var_dump(isset($object['foo']), empty($object['foo']));
Output for 7.0.0 - 7.1.0
bool(true) bool(true) string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" string(35) "Called: ArrayObjectChild::offsetGet" bool(true) bool(true) string(46) "Called: ArrayAcessImplementation::offsetExists" string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" Fatal error: Uncaught Error: Call to undefined method ArrayAcessImplementation::_array() in /in/DBFu5:32 Stack trace: #0 /in/DBFu5(51): ArrayAcessImplementation->offsetGet('foo') #1 {main} thrown in /in/DBFu5 on line 32
Process exited with code 255.
Output for 5.6.0 - 5.6.28, hhvm-3.10.0 - 3.12.0
bool(true) bool(true) string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" string(35) "Called: ArrayObjectChild::offsetGet" bool(true) bool(true) string(46) "Called: ArrayAcessImplementation::offsetExists" string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" Fatal error: Call to undefined method ArrayAcessImplementation::_array() in /in/DBFu5 on line 32
Process exited with code 255.
Output for 5.2.3 - 5.5.35
bool(true) bool(true) string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" bool(true) bool(false) string(46) "Called: ArrayAcessImplementation::offsetExists" string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" Fatal error: Call to undefined method ArrayAcessImplementation::_array() in /in/DBFu5 on line 32
Process exited with code 255.
Output for 5.2.2
bool(true) bool(true) string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" bool(true) bool(false) string(46) "Called: ArrayAcessImplementation::offsetExists" string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" <br /> <b>Fatal error</b>: Call to undefined method ArrayAcessImplementation::_array() in <b>/in/DBFu5</b> on line <b>32</b><br />
Process exited with code 255.
Output for 5.2.1
bool(true) bool(true) string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" bool(false) bool(true) string(46) "Called: ArrayAcessImplementation::offsetExists" string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" <br /> <b>Fatal error</b>: Call to undefined method ArrayAcessImplementation::_array() in <b>/in/DBFu5</b> on line <b>32</b><br />
Process exited with code 255.
Output for 5.1.0 - 5.2.0
bool(true) bool(false) string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" bool(true) bool(false) string(46) "Called: ArrayAcessImplementation::offsetExists" string(46) "Called: ArrayAcessImplementation::offsetExists" string(43) "Called: ArrayAcessImplementation::offsetGet" <br /> <b>Fatal error</b>: Call to undefined method ArrayAcessImplementation::_array() in <b>/in/DBFu5</b> on line <b>32</b><br />
Process exited with code 255.
Output for 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in <b>/in/DBFu5</b> on line <b>21</b><br />
Process exited with code 255.
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in <b>/in/DBFu5</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
<br /> <b>Parse error</b>: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in <b>/in/DBFu5</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in <b>/in/DBFu5</b> on line <b>5</b><br />
Process exited with code 255.