Online PHP editor | output for tOSug

@ 2019-07-01T18:26:03Z

<?php

// Duplication for completion...
interface I1 {}
interface I2 extends I1 {
    public function instanceOfSelf(self $object);

    public function instanceOfParent(parent $object);
}

class A implements I1 {}

class B implements I2 {
    private function printBool(bool $b) {
        echo ($b ? 'true' : 'false') . "\n";
    }

    public function instanceOfSelf(I2 $object) {
        $this->printBool($object instanceof I2);
    }

    public function instanceOfParent(I1 $object) {
        $this->printBool($object instanceof I1);
    }                        
}

$a = new A;
$b = new B;

$b->instanceOfSelf($b);   // true
$b->instanceOfParent($a); // true
$b->instanceOfParent($b); // true

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: Cannot use "parent" when current class scope has no parent in /in/tOSug on line 8
Process exited with code 255.
Output for 7.4.0 - 7.4.33: Deprecated: Cannot use "parent" when current class scope has no parent in /in/tOSug on line 8 Fatal error: Could not check compatibility between B::instanceOfParent(I1 $object) and I2::instanceOfParent(parent $object), because class parent is not available in /in/tOSug on line 22
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33: Fatal error: Declaration of B::instanceOfParent(I1 $object) must be compatible with I2::instanceOfParent(parent $object) in /in/tOSug on line 13
Process exited with code 255.

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