Util.php: fixed string concatenation (+ => .)

README.md

@@ -21,8 +21,8 @@ We have thus implemented this triple representation using associative arrays rat
 $triple = [
     'subject' =>   'http://example.org/cartoons#Tom',
     'predicate' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type',
-    'object' =>    'http://example.org/cartoons#Cat'
-    ,'graph' =>     'http://example.org/mycartoon' #optional
+    'object' =>    'http://example.org/cartoons#Cat',
+    'graph' =>     'http://example.org/mycartoon', #optional
     ];
 ```
 

src/Util.php

@@ -49,7 +49,7 @@ public static function getLiteralValue ($literal)
     {
         preg_match("/^\"(.*)\"/", $literal, $match); //TODO: somehow the copied regex did not work. To be checked. Contained [^]
         if (empty($match)) {
-            throw new Error($literal + ' is not a literal');
+            throw new \Exception($literal . ' is not a literal');
         }
         return $match[1];
     }
@@ -58,7 +58,7 @@ public static function getLiteralType ($literal)
     {
         preg_match('/^".*"(?:\^\^([^"]+)|(@)[^@"]+)?$/',$literal,$match);//TODO: somehow the copied regex did not work. To be checked. Contained [^] instead of the .
         if (empty($match))
-            throw new Error($literal + ' is not a literal');
+            throw new \Exception($literal . ' is not a literal');
         if (!empty($match[1])) {
             return $match[1];
         } else {
@@ -72,7 +72,7 @@ public static function getLiteralLanguage ($literal)
     {
         preg_match('/^".*"(?:@([^@"]+)|\^\^[^"]+)?$/', $literal, $match);
         if (empty($match))
-            throw new Error($literal + ' is not a literal');
+            throw new \Exception($literal . ' is not a literal');
         return isset($match[1]) ? strtolower($match[1]) : '';
     }