example aop wrapper with the autoload

aop_wrap_autoload.php

<?php

use Composer\Autoload\ClassLoader;
use Zeus\Trace\Order;
use Zeus\Trace\RealService;

/**
 * @var ClassLoader $autoload
 */
$autoload = require 'vendor/autoload.php';

function my_autoload($className)
{
    $array = explode('\\', $className);
    $class = end($array);
    global $autoload;
    $file = $autoload->findFile($className);

    if (!file_exists($file)) {
        return;
    }
    $code = file_get_contents($file);

    $randomName = 'Proxy_mock' . time() . mt_rand();
    $realCode = str_replace(
        "class $class",
        "class $randomName",
        $code
    );

    $code = str_replace(['<?php', '?>'], '', $realCode);
    $code = trim($code);
    eval($code);

    $explode = explode('\\', $className);
    array_pop($explode);
    $namespace = implode('\\', $explode);

    $proxyCode = "
        namespace $namespace;
        class $class {
            private \$service;

            public function __construct() {
                \$this->service = new \\Zeus\\Trace\\$randomName();
            }

            public function __call(\$methodName, \$arguments) {
                echo \"Before \$methodName\" . PHP_EOL;
                echo json_encode(['arguments'=>\$arguments]) . PHP_EOL;
                \$result = call_user_func_array([\$this->service, \$methodName], \$arguments);
                echo \"After \$methodName\" . PHP_EOL;
                echo json_encode(['return'=>\$result]) . PHP_EOL;
                return \$result;
            }
        }
    ";

    try {
        eval($proxyCode);
    } catch (\ParseError $e) {
        echo "Eval failed: " . $e->getMessage() . "\n";
        return;
    }
}

spl_autoload_register('my_autoload', prepend: true);

// Test
$order = new Order();
$order->setId(5);
$order->getId();
$order->getId();
$order->getId();
$order->getId();
$order->getId();

echo '________________________________________________________________';
echo PHP_EOL;

$order1 = new Order;
$order1->setId(10);

echo '________________________________________________________________';
echo PHP_EOL;
$realService = new RealService();
$realService->hello('John Doe');