3v4l.org

run code in 500+ PHP versions simultaneously

@ 2020-04-17T07:53:27Z

<?php

interface FruitInterface {
    
}

interface AppleInterface extends FruitInterface {
    
}

class RedApple implements AppleInterface {
    
}

interface JuicerInterface {
    
    public function addComponent(FruitInterface $fruit);
    
}

class CommonJuicer implements JuicerInterface {
    
    public function addComponent(FruitInterface $fruit){
        
    }   
    
}

class SpecialAppleJuicer implements JuicerInterface {
    
    public function addComponent(AppleInterface $apple){
        
    }    
    
}

$redApple = new RedApple();

$juicer = new SpecialAppleJuicer();
$juicer->addComponent($redApple);

// Expected that this would not produce Fatal Error, because RedApple implements FruitInterface.
// "As of PHP 7.4.0, full covariance and contravariance support was added"
// https://www.php.net/manual/en/language.oop5.variance.php

Output
Performance
VLD
References
Branches

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26: Fatal error: Declaration of SpecialAppleJuicer::addComponent(AppleInterface $apple) must be compatible with JuicerInterface::addComponent(FruitInterface $fruit) in /in/vC0WM on line 31
Process exited with code 255.
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33: Fatal error: Declaration of SpecialAppleJuicer::addComponent(AppleInterface $apple) must be compatible with JuicerInterface::addComponent(FruitInterface $fruit) in /in/vC0WM on line 29
Process exited with code 255.
Output for 8.5.0 - 8.5.11: Fatal error: Declaration of SpecialAppleJuicer::addComponent(AppleInterface $apple) must be compatible with JuicerInterface::addComponent(FruitInterface $fruit) in /in/vC0WM on line 31 Stack trace: #0 {main}
Process exited with code 255.

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31.86 ms | 1143 KiB | 11 Q