Online PHP editor | output for Go6WO

@ 2020-09-04T07:27:35Z

<?php

trait AbstractTrait {
    abstract public function selfReturner() : self;
}

trait ConcreteTrait {
    public function selfReturner() : self {
        return $this;
    }
}

class Test {
    use AbstractTrait;
    use ConcreteTrait;
}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Output for 7.4.0 - 7.4.33: Fatal error: Declaration of ConcreteTrait::selfReturner(): ConcreteTrait must be compatible with AbstractTrait::selfReturner(): AbstractTrait in /in/Go6WO on line 8
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: Fatal error: Declaration of ConcreteTrait::selfReturner(): ConcreteTrait must be compatible with AbstractTrait::selfReturner(): AbstractTrait in /in/Go6WO on line 13
Process exited with code 255.

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