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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; } } trait dependOnDad { protected function init(Dad $dependency = null) { $this->foo = $dependency; return $this; } } class Ball extends Base { use dependOnDad; } var_dump(new Ball());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of dependOnDad::init(?Dad $dependency = null) must be compatible with Base::init(?Granny $dependency = null) in /in/Wkcoa on line 56
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of dependOnDad::init(?Dad $dependency = NULL) should be compatible with Base::init(?Granny $dependency = NULL) in /in/Wkcoa on line 56 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of dependOnDad::init(?Dad $dependency = NULL) should be compatible with Base::init(?Granny $dependency = NULL) in /in/Wkcoa on line 62 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 7.0.0 - 7.0.20
Warning: Declaration of dependOnDad::init(Dad $dependency = NULL) should be compatible with Base::init(Granny $dependency = NULL) in /in/Wkcoa on line 62 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 5.4.11 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Strict Standards: Declaration of dependOnDad::init() should be compatible with Base::init(Granny $dependency = NULL) in /in/Wkcoa on line 65 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 5.4.0 - 5.4.10
Strict Standards: Declaration of Ball::init() should be compatible with Base::init(Granny $dependency = NULL) in /in/Wkcoa on line 65 object(Ball)#1 (1) { ["foo":protected]=> NULL }
Output for 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/Wkcoa on line 55
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/Wkcoa on line 17
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/Wkcoa 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
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Wkcoa 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/Wkcoa on line 4
Process exited with code 255.
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