Allow disabling of auto prepending the field labels shown in the error message.

src/Valitron/Validator.php

@@ -83,6 +83,11 @@ class Validator
      */
     protected $stop_on_first_fail = false;
 
+    /**
+     * @var bool
+     */
+    protected $prepend_labels = true;
+
     /**
      * Setup validation
      *
@@ -144,6 +149,14 @@ class Validator
         return static::$_langDir ?: dirname(dirname(__DIR__)) . '/lang';
     }
 
+    /**
+     * @param bool $prepend_labels
+     */
+    public function prependLabels($prepend_labels = true)
+    {
+        $this->prepend_labels = $prepend_labels;
+    }
+
     /**
      * Required field validator
      *
@@ -900,6 +913,12 @@ class Validator
         return false;
     }
 
+    /**
+     * @param $field
+     * @param $value
+     * @param $params
+     * @return bool
+     */
     protected function validateInstanceOf($field, $value, $params)
     {
         $isInstanceOf = false;
@@ -1022,6 +1041,12 @@ class Validator
         return true;
     }
 
+    /**
+     * @param $field
+     * @param $value
+     * @param $params
+     * @return bool
+     */
     protected function validateArrayHasKeys($field, $value, $params)
     {
         if (!is_array($value) || !isset($params[0])) {
@@ -1124,6 +1149,12 @@ class Validator
         $this->_labels = array();
     }
 
+    /**
+     * @param $data
+     * @param $identifiers
+     * @param bool $allow_empty
+     * @return array
+     */
     protected function getPart($data, $identifiers, $allow_empty = false)
     {
         // Catches the case where the field is an array of discrete values
@@ -1167,6 +1198,13 @@ class Validator
         }
     }
 
+    /**
+     * @param $validation
+     * @param $field
+     * @param $values
+     * @param $multiple
+     * @return bool
+     */
     private function validationMustBeExcecuted($validation, $field, $values, $multiple){
         //always excecute requiredWith(out) rules
         if (in_array($validation['rule'], array('requiredWith', 'requiredWithout'))){
@@ -1288,6 +1326,9 @@ class Validator
         return false;
     }
 
+    /**
+     * @param $callback
+     */
     protected static function assertRuleCallback($callback)
     {
         if (!is_callable($callback)) {
@@ -1471,7 +1512,9 @@ class Validator
                 }
             }
         } else {
-            $message = str_replace('{field}', ucwords(str_replace('_', ' ', $field)), $message);
+            $message = $this->prepend_labels
+                ? str_replace('{field}', ucwords(str_replace('_', ' ', $field)), $message)
+                : str_replace('{field} ', '', $message);
         }
 
         return $message;