Added helper method to check, if an array has only null-values.

app/Http/helpers.php

@@ -101,3 +101,21 @@ function endOfMonth($year, $month, $format='d.m.Y') {
     return Carbon\Carbon::createFromDate($year, $month)
                         ->endOfMonth()->format($format);
 }
+
+/**
+ * Check, if all fields of an array are null.
+ * Returns true, if all fields of $array are null. Returns fals,e otherwise
+ *
+ * @param  array   $array
+ * @return boolean
+ */
+function allEmpty($array)
+{
+    foreach ($array as $item) {
+        if ($item !== null) {
+            return false;
+        }
+    }
+
+    return true;
+}