Merge pull request #13 from jr-cologne/jr_fix-#12

Fix #12

Author: jr-cologne

composer.json

@@ -1,7 +1,7 @@
 {
   "name": "jr-cologne/db-class",
   "type": "library",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "A simple database class with PHP, PDO and a query builder.",
   "keywords": [
     "database",
@@ -19,7 +19,7 @@
     }
   },
   "homepage": "https://github.com/jr-cologne/db-class",
-  "time": "2017-11-10",
+  "time": "2017-11-11",
   "license": "MIT",
   "authors": [
     {
@@ -31,7 +31,7 @@
   ],
   "support": {
     "issues": "https://github.com/jr-cologne/db-class/issues",
-    "source": "https://github.com/jr-cologne/db-class/tree/v2.1.0",
+    "source": "https://github.com/jr-cologne/db-class/tree/v2.1.1",
     "docs": "https://github.com/jr-cologne/db-class/blob/README.md"
   }
 }

src/API.md

@@ -270,6 +270,8 @@ Returns the first record given in DB::results.
 
 On success: `array` (default) or other type based on `PDO::FETCH_MODE`
 
+If not existing: `null`
+
 On failure: `boolean` false
 
 

src/DB.php

@@ -13,7 +13,7 @@
  * @author JR Cologne <[email protected]>
  * @copyright 2017 JR Cologne
  * @license https://github.com/jr-cologne/db-class/blob/master/LICENSE MIT
- * @version v2.1.0
+ * @version v2.1.1
  * @link https://github.com/jr-cologne/db-class GitHub Repository
  * @link https://packagist.org/packages/jr-cologne/db-class Packagist site
  *
@@ -212,11 +212,11 @@ protected function all() {
   /**
    * Returns the first record given in DB::results.
    * 
-   * @return mixed on success: array (default), based on PDO::FETCH_MODE, on failure: boolean false
+   * @return mixed on success: array (default), based on PDO::FETCH_MODE, if not existing: null, on failure: boolean false
    */
   protected function first() {
     if (!$this->query_failed) {
-      return $this->results[0];
+      return isset($this->results[0]) ? $this->results[0] : null;
     }
 
     return false;

src/Exceptions/UnsupportedKeywordException.php

@@ -13,7 +13,7 @@
  * @author JR Cologne <[email protected]>
  * @copyright 2017 JR Cologne
  * @license https://github.com/jr-cologne/db-class/blob/master/LICENSE MIT
- * @version v2.1.0
+ * @version v2.1.1
  * @link https://github.com/jr-cologne/db-class GitHub Repository
  * @link https://packagist.org/packages/jr-cologne/db-class Packagist site
  *

src/QueryBuilder.php

@@ -13,7 +13,7 @@
  * @author JR Cologne <[email protected]>
  * @copyright 2017 JR Cologne
  * @license https://github.com/jr-cologne/db-class/blob/master/LICENSE MIT
- * @version v2.1.0
+ * @version v2.1.1
  * @link https://github.com/jr-cologne/db-class GitHub Repository
  * @link https://packagist.org/packages/jr-cologne/db-class Packagist site
  *