Online PHP editor | output for HKC2p

@ 2018-05-16T15:06:52Z

<?php

trait T1
{
    abstract protected function _doStuff();
}

trait T2
{
    protected function _doStuff()
    {
        echo "Doing stuff in trait\n";
    }
}

class C
{
    use T1 {
        _doStuff as _traitDoStuff;
    }
    
    use T2 {
        _doStuff as _traitDoStuff;
    }
    
    protected function _doStuff()
    {
        echo "Doing stuff in class\n";
        
        $this->_traitDoStuff();
    }
}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13: Fatal error: An alias was defined for method _doStuff(), which exists in both T1 and T2. Use T1::_doStuff or T2::_doStuff to resolve the ambiguity in /in/HKC2p on line 16
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, 7.4.0 - 7.4.33: Fatal error: Class C contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (C::_doStuff) in /in/HKC2p on line 16
Process exited with code 255.

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