Simple Bootstrapping and Sandboxing of untrusted legacy code

Features:

• decorate set_error_handler & errorreporting: in sync ! switch'em whenever you want during runtime.
• decorate set_exception_handler
• decorate register_shutdown_function: unfortunately all functions get executed. Solution: Callback Proxy and Manager
• callback functions for all kind of events (onError, onException, onShutdownFailed, ...). No need to override class methods when trying to tweak current business logic.
• sandbox untrusted legacy code: all error-/exception-/shutdown-settings you changed to make dirty code run will be reverted after executing.

Sandbox Example: let's play with dirty legacy toy ...

// use dirty legacy code: but sandboxed.
var_dump('using dirty code, sandboxed ... ');
$playground = Bootstrap::getInstance()
  ->getPlayground();
$sandbox = $playground->createSimpleSandbox();

$sandbox
  ->setErrorReportingCaptureLevel(
    $sandbox->getErrorReportingCaptureLevelAllStrictNoNotice() // (E_ALL|E_STRICT) ^ E_NOTICE
  )
  ->setDelegateExceptionEnabled(false) // catch exceptions, do not rethrow
  ->setToy(
    function () {
      $data = array();
      $value = $data[0]; // E_NOTICE, but not captured at errorReporting
      var_dump('the value is ...');
      var_dump($value);
      var_dump('this was dirty');

      return true;
    }
   )
  ->setOnError(
     function (Playground $playground, $error) {
       var_dump('ERROR');
     }
    )
  ->setParams(array())
  ->play();
  
 var_dump('--------- SANDBOX HAS EXCEPTION -----------');
 var_dump($sandbox->hasException());
 if ($sandbox->hasException()) {
    var_dump($sandbox->getException()->getMessage());
 }
 var_dump('--------- SANDBOX RESULT -----------');
 var_dump($sandbox->getResult());