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<?php interface GoAlgorithm { public function go(); } class GoByDrivingAlgorithm implements GoAlgorithm { public function go() { echo "Now I'm driving." .PHP_EOL; } } class GoByFlying implements GoAlgorithm { public function go() { echo "Now I'm flying." . PHP_EOL; } } class GoByFlyingFast implements GoAlgorithm { public function go() { echo "Now I'm flying fast" . PHP_EOL; } } class Vehicle { private $goAlgorithm; public function __construct(GoAlgorithm $goType) { parent::__construct(); $this->goAlgorithm = $goType; } public function setModeOfTransportation(GoAlgorithm $goType) { $this->goAlgorithm = $goType; } public function drive() { return $this->goAlgorithm->go(); } } // setter injection $streetRacer = new Vehicle(); $streetRacer->setModeOfTransportation(new GoByDrivingAlgorithm()); $formulaone = new Vehicle(); $formulaone->setModeOfTransportation(new GoByDrivingAlgorithm()); $helicopter = new Vehicle(); $helicopter->setModeOfTransportation(new GoByFlying()); $jets = new Vehicle(); $jets->setModeOfTransportation(new GoByFlyingFast()); $streetRacer->drive(); $formulaone->drive(); $helicopter->drive(); $jets->drive(); // constructor injection $streetRacer = new Vehicle(new GoByDrivingAlgorithm()); $formulaone = new Vehicle(new GoByDrivingAlgorithm()); $helicopter = new Vehicle(new GoByFlying()); $jets = new Vehicle(new GoByFlyingFast()); $streetRacer->drive(); $formulaone->drive(); $helicopter->drive(); $jets->drive();
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: Cannot use "parent" when current class scope has no parent in /in/iqOKH on line 37
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: Cannot use "parent" when current class scope has no parent in /in/iqOKH on line 37 Fatal error: Uncaught ArgumentCountError: Too few arguments to function Vehicle::__construct(), 0 passed in /in/iqOKH on line 53 and exactly 1 expected in /in/iqOKH:36 Stack trace: #0 /in/iqOKH(53): Vehicle->__construct() #1 {main} thrown in /in/iqOKH on line 36
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
Fatal error: Uncaught ArgumentCountError: Too few arguments to function Vehicle::__construct(), 0 passed in /in/iqOKH on line 53 and exactly 1 expected in /in/iqOKH:36 Stack trace: #0 /in/iqOKH(53): Vehicle->__construct() #1 {main} thrown in /in/iqOKH on line 36
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Fatal error: Uncaught TypeError: Argument 1 passed to Vehicle::__construct() must implement interface GoAlgorithm, none given, called in /in/iqOKH on line 53 and defined in /in/iqOKH:36 Stack trace: #0 /in/iqOKH(53): Vehicle->__construct() #1 {main} thrown in /in/iqOKH on line 36
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Catchable fatal error: Argument 1 passed to Vehicle::__construct() must implement interface GoAlgorithm, none given, called in /in/iqOKH on line 53 and defined in /in/iqOKH on line 36
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Argument 1 passed to Vehicle::__construct() must be an object of class GoAlgorithm, called in /in/iqOKH on line 53 and defined in /in/iqOKH on line 36
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 1 must be an object of class GoAlgorithm in /in/iqOKH on line 36
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/iqOKH 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 in /in/iqOKH on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/iqOKH on line 3
Process exited with code 255.
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