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<?php class TestParent { public function execute(array $data) { return array( 'test' => 'test' ); } } trait TestTrait { public function execute(int $id) { return $id + 1; } } class TestClass extends TestParent { use TestTrait; function __construct() { var_dump($this->execute()); } } new TestClass();
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 TestTrait::execute(int $id) must be compatible with TestParent::execute(array $data) in /in/esne0 on line 15
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of TestTrait::execute(int $id) should be compatible with TestParent::execute(array $data) in /in/esne0 on line 15 Fatal error: Uncaught ArgumentCountError: Too few arguments to function TestClass::execute(), 0 passed in /in/esne0 on line 27 and exactly 1 expected in /in/esne0:15 Stack trace: #0 /in/esne0(27): TestClass->execute() #1 /in/esne0(31): TestClass->__construct() #2 {main} thrown in /in/esne0 on line 15
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of TestTrait::execute(int $id) should be compatible with TestParent::execute(array $data) in /in/esne0 on line 21 Fatal error: Uncaught ArgumentCountError: Too few arguments to function TestClass::execute(), 0 passed in /in/esne0 on line 27 and exactly 1 expected in /in/esne0:15 Stack trace: #0 /in/esne0(27): TestClass->execute() #1 /in/esne0(31): TestClass->__construct() #2 {main} thrown in /in/esne0 on line 15
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Warning: Declaration of TestTrait::execute(int $id) should be compatible with TestParent::execute(array $data) in /in/esne0 on line 21 Fatal error: Uncaught TypeError: Argument 1 passed to TestClass::execute() must be of the type integer, none given, called in /in/esne0 on line 27 and defined in /in/esne0:15 Stack trace: #0 /in/esne0(27): TestClass->execute() #1 /in/esne0(31): TestClass->__construct() #2 {main} thrown in /in/esne0 on line 15
Process exited with code 255.
Output for 5.4.11 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Strict Standards: Declaration of TestTrait::execute() should be compatible with TestParent::execute(array $data) in /in/esne0 on line 29 Catchable fatal error: Argument 1 passed to TestClass::execute() must be an instance of int, none given, called in /in/esne0 on line 27 and defined in /in/esne0 on line 15
Process exited with code 255.
Output for 5.4.2 - 5.4.10
Strict Standards: Declaration of TestClass::execute() should be compatible with TestParent::execute(array $data) in /in/esne0 on line 29 Catchable fatal error: Argument 1 passed to TestClass::execute() must be an instance of int, none given, called in /in/esne0 on line 27 and defined in /in/esne0 on line 15
Process exited with code 255.

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