add wrapper for PDO::beginTransaction, PDO::rollback and PDO::commit

.travis.yml

@@ -1,8 +1,8 @@
 language: php
 php:
   - 5.6
-  - 5.5
   - 7
+  - 7.3
   - hhvm
 install: composer install
 script: ./vendor/bin/phpunit --coverage-clover clover.xml
@@ -11,4 +11,5 @@ matrix:
   fast_finish: true
   allow_failures:
      - php: 7
+     - PHP: 7.3
      - php: hhvm

src/DataAccess.php

@@ -442,4 +442,34 @@ public function filterInsertValues($data, $fields)
 		}
 		return $insertValues;
 	}
+
+    /**
+     * Initiates a transaction
+     * @see \PDO::beginTransaction()
+     * @return bool <code>TRUE</code> on success or <code>FALSE</code> on failure.
+     */
+    public function beginTransaction()
+    {
+        return $this->pdo->beginTransaction();
+    }
+
+    /**
+     * Initiates a transaction
+     * @see \PDO::rollBack()
+     * @return bool <code>TRUE</code> on success or <code>FALSE</code> on failure.
+     */
+    public function rollback()
+    {
+        return $this->pdo->rollBack();
+    }
+
+    /**
+     * Commits a transaction
+     * @see \PDO::commit()
+     * @return bool <code>TRUE</code> on success or <code>FALSE</code> on failure.
+     */
+    public function commit()
+    {
+        return $this->pdo->commit();
+    }
 }