Bug #70710 [Nab]: Method compatible declaration issue with parent of class when using trait

Edit report at https://bugs.php.net/bug.php?id=70710&edit=1 ID: 70710 Updated by: bwoebi@php.net Reported by: wouter at wouter0100 dot nl Summary: Method compatible declaration issue with parent of class when using trait Status: Not a bug Type: Bug Package: Class/Object related PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Addendum: note that use ... as ...; instructions in traits are pure aliases. The method with the original name still exists in the class. See also: https://3v4l.org/ANmkM#v700alpha1 (execute() and executeTrait() are defined) This is necessary, so that calls between methods inside traits don't break, as traits don't declare their own scope, but are pure compiler-assisted copy&paste. Previous Comments: ------------------------------------------------------------------------ [2015-10-15 20:50:34] bwoebi@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php PHP is not supporting method overloading. And it requires declarations to match (Liskov Substitution principle needs to hold: each value I can pass to a parent class must also be allowed to be passed to a child class), P.s.: In case of a declaration warning, the method is not added at all. ------------------------------------------------------------------------ [2015-10-14 10:12:10] wouter at wouter0100 dot nl Description: ------------ When you extend a class and use a trait with the same method, you'll get a declaration error. Only by overwriting the extended classes method within the class itself, this is fixed. Test script: --------------- Method test: https://3v4l.org/gMEGg Declaration error: https://3v4l.org/IJoio Current workaround: https://3v4l.org/gIq0E Expected result: ---------------- That the (strict) warning isn't being shown and I'm able to execute $this->execute for the parents method and $this->executeTrait for the trait's method. Actual result: -------------- See tests. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70710&edit=1