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run code in 300+ PHP versions simultaneously

@ 2021-05-02T19:23:19Z

<?php

declare(strict_types=1);

namespace Domain\Mixins { 
    trait ContentAware {
        protected string $content;
        
        public function getContent() {
            return $this->content;
        }    
        
        public function setContent(string $content) {
            $this->content = $content;
        }
    }
    
    use Domain\user\User;
    
    trait UserAware {
        protected User $author;
        
        public function getAuthor() {
            return $this->author;
        }    
        
        public function setAuthor(User $author) {
            $this->author = $author;
        }
    }
}

namespace Domain\User {
    class User {
        public function __construct(public string $name){}
    }
}

namespace Domain\Forum {
    use Domain\Mixins;

    class Message {
        use Mixins\ContentAware, Mixins\UserAware;
    }
}
    
namespace {
    use Domain\Forum\Message;
    use Domain\User\User;
    
    $message = new Message;
    $message->setContent('Hello');
    $message->setAuthor(new User('greg'));
    
    echo sprintf('%s %s', $message->getContent(), $message->getAuthor()->name);

}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Hello greg
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Hello greg
Output for 7.4.0 - 7.4.33: Parse error: syntax error, unexpected 'public' (T_PUBLIC), expecting variable (T_VARIABLE) in /in/frW8k on line 35
Process exited with code 255.
Output for 7.3.0 - 7.3.33: Parse error: syntax error, unexpected 'string' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/frW8k on line 7
Process exited with code 255.

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