Online PHP editor | output for GgXXV

@ 2020-02-09T16:44:16Z

<?php

interface VisitorInterface
{
}

interface SerializeVisitorInterface extends VisitorInterface
{
    public function visitSomething();
}

class SerializeVisitor implements SerializeVisitorInterface
{
    public function visitSomething()
    {
        echo 'Hi something';
    }
}

class BaseEvent
{
    protected $visitor;
    
    public function getVisitor(): VisitorInterface
    {
        return $this->visitor;
    }
}

class SerializeEvent extends BaseEvent
{
    public function __construct()
    {
        $this->visitor = new SerializeVisitor();
    }
    
    public function getVisitor(): SerializeVisitorInterface
    {
        return $this->visitor;
    }
}

$event = new SerializeEvent();

$event->getVisitor()->visitSomething();

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: Hi something
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: Fatal error: Declaration of SerializeEvent::getVisitor(): SerializeVisitorInterface must be compatible with BaseEvent::getVisitor(): VisitorInterface in /in/GgXXV on line 41
Process exited with code 255.

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