3v4l.org

run code in 300+ PHP versions simultaneously

@ 2018-05-16T19:10:09Z

<?php

trait A {                                                                        
    abstract public function foo();                                              
}                                                                                
                                                                                 
class B {                                                                        
    use A; // works                                                              
    public function foo() {}                                                     
}                                                                                
                                                                                 
class C {                                                                        
    use A { A::foo as traitFoo; } // works, provided this:                       
    public function traitFoo() {} // <-- is present                              
    public function foo() {}                                                     
}                                                                                
                                                                                 
class D {                                                                        
    use A { A::foo as traitFoo; } // does not work by itself                     
    public function foo() {}                                                     
}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: Fatal error: Class D contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (D::traitFoo) in /in/Zf9SR on line 18
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Fatal error: Class D contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (D::foo) in /in/Zf9SR on line 18
Process exited with code 255.
Output for 5.6.0 - 5.6.40: Fatal error: Class D contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (D::foo) in /in/Zf9SR on line 21
Process exited with code 255.

preferences:dark modelive previewkey bindings

146.24 ms | 408 KiB | 5 Q