ad parent paramter to pis

geoapi/utility/StringManager.php

@@ -54,6 +54,18 @@ class StringManager {
         }
         return FALSE;
     }
+    
+        /**
+     * Method if the string is in integor
+     * @param string $value
+     * @return boolean
+     */
+    public static function validInt($value) {
+       if (!ctype_digit($value) || PHP_INT_MAX < $value) {
+                return FALSE;
+        }
+        return TRUE;
+    }
 
 }