Preview of privileged advices in the Go! AOP PHP framework

PrivilegedAspect.php

<?php

use Go\Aop\Aspect;
use Go\Aop\Intercept\MethodInvocation;
use Go\Lang\Annotation\Around;

/**
 * Privileged aspect shows the power of privileged advices.
 * 
 * Privileged advice is running in the scope of target for the current joinpoint
 */
class PrivilegedAspect implements Aspect
{
    /**
     * Privileged advice, pay an attention to the 'scope="target"' in the annotattion
     *
     * @Around("execution(public Test->method(*))", scope="target")
     *
     * @param MethodInvocation $invocation
     * @return mixed|null|object
     */
    protected function aroundMethodExecution(MethodInvocation $invocation)
    {
        echo "In the around() hook", PHP_EOL;
        
        /** @var Test $this */
        echo get_class($this), PHP_EOL; // 'Test', not the 'PrivilegedAspect'
        echo $this->message, PHP_EOL;   // We are running in the scope of target, so we can easily access protected fields
        
        $obj = new static();   // $obj will be instance of 'Test' class or it children, according to the LSB
        
        // $invocation->proceed(); Prevent an execution of the original method Test->method()
        $obj->tryToCallMe();   // Instead of original method, we are calling the protected method tryToCallMe()
                               // from another instance of Test class ($obj)!
    }
}

Test.php

<?php

class Test
{
    protected $message = 'Try to get me!';
    
    public function method()
    {
        echo 'Hello, AOP!', PHP_EOL;
    }
    
    protected function tryToCallMe()
    {
        echo 'Yahoo ' . $this->message, PHP_EOL;
    }
}

test.php

<?php

// .. AOP initialization here, registration of PrivilegedAspect in the kernel

$test = new Test();
$test->method();

/**
 * Output will be:
 * 
 * In the around() hook
 * Test
 * Try to get me!
 * Yahoo Try to get me!
 */

Documentation about privileged advices is available at http://go.aopphp.com/docs/privileged-advices/