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<?php class Base { protected $foo = null; final public function __construct(Granny $init = null) { return $this->init($init); } protected function init(Granny $dependency = null){} } class Granny { protected $name = null; protected $age = null; public function __construct(array $vals = null) { foreach($vals as $name => $val) { $name = 'set'.ucfirst($name); if (method_exists($this, $name)) { $this->{$name}($val); } } return $this; } //basic gettter && setters public function getAge() { return $this->age; } public function setAge($age = null) { $this->age = $age === null ? null : (int) $age; return $this; } } class Dad extends Granny { //Dad's secret private $likesMom = null; public function getLikesMom() { return $this->likesMom; } public function setLikesMom($bool = null) { $this->likesMom = $bool === null ? null : !!$bool; return $this; } } class Ball extends Base { protected function init(Dad $dependency = null) { $this->foo = $dependency; return $this; } } var_dump(new Ball());
Output for 7.1.0
Warning: Declaration of Ball::init(?Dad $dependency = NULL) should be compatible with Base::init(?Granny $dependency = NULL) in /in/WS3jU on line 61 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 7.0.0 - 7.0.14
Warning: Declaration of Ball::init(Dad $dependency = NULL) should be compatible with Base::init(Granny $dependency = NULL) in /in/WS3jU on line 61 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for hhvm-3.10.0 - 3.12.0
object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 5.4.0 - 5.6.28
Strict Standards: Declaration of Ball::init() should be compatible with Base::init(Granny $dependency = NULL) in /in/WS3jU on line 61 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 5.3.0 - 5.3.29
Strict Standards: Declaration of Ball::init() should be compatible with that of Base::init() in /in/WS3jU on line 61 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 5.1.0 - 5.2.17
Strict Standards: Declaration of Ball::init() should be compatible with that of Base::init() in /in/WS3jU on line 61 object(Ball)#1 (1) { ["foo:protected"]=> NULL }
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/WS3jU on line 15
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/WS3jU on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/WS3jU on line 4
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/WS3jU on line 4
Process exited with code 255.