--- /dev/null
+<?php
+
+namespace Drupal\devel\Plugin\Block;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Block\BlockBase;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Provides a block for executing PHP code.
+ *
+ * @Block(
+ * id = "devel_execute_php",
+ * admin_label = @Translation("Execute PHP")
+ * )
+ */
+class DevelExecutePHP extends BlockBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function blockAccess(AccountInterface $account) {
+ return AccessResult::allowedIfHasPermission($account, 'execute php code');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function build() {
+ return \Drupal::formBuilder()->getForm('Drupal\devel\Form\ExecutePHP');
+ }
+
+}