Allow disabling of auto prepending the field labels.

README.md

@@ -127,6 +127,33 @@ V::lang('ar');
 
 ```
 
+Disabling the {field} name in the output of the error message. 
+
+```php
+use Valitron\Validator as V;
+
+$v = new Valitron\Validator(['name' => 'John']);
+$v->rule('required', ['name']);
+
+// Disable prepending the labels
+$v->setPrependLabels(false);
+
+// Error output for the "false" condition
+[
+    ["name"] => [
+        "is required"
+    ]
+]
+
+// Error output for the default (true) condition
+[
+    ["name"] => [
+        "name is required"
+    ]
+]
+
+```
+
 You can conditionally require values using required conditional rules. In this example, for authentication, we're requiring either a token when both the email and password are not present, or a password when the email address is present.
 ```php
 // this rule set would work for either data set...

src/Valitron/Validator.php

@@ -83,6 +83,11 @@ class Validator
      */
     protected $stop_on_first_fail = false;
 
+    /**
+     * @var bool
+     */
+    protected $prepend_labels = true;
+
     /**
      * Setup validation
      *
@@ -144,6 +149,14 @@ public static function langDir($dir = null)
         return static::$_langDir ?: dirname(dirname(__DIR__)) . '/lang';
     }
 
+    /**
+     * @param bool $prepend_labels
+     */
+    public function setPrependLabels($prepend_labels = true)
+    {
+        $this->prepend_labels = $prepend_labels;
+    }
+
     /**
      * Required field validator
      *
@@ -1471,7 +1484,9 @@ protected function checkAndSetLabel($field, $message, $params)
                 }
             }
         } 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;

tests/Valitron/ErrorMessagesTest.php

@@ -12,6 +12,19 @@ public function testErrorMessageIncludesFieldName()
         $this->assertSame(array("Name is required"), $v->errors('name'));
     }
 
+    /**
+     * Test the disabling of prepending the field labels
+     * to error messages.
+     */
+    public function testErrorMessageExcludeFieldName()
+    {
+        $v = new Validator(array());
+        $v->setPrependLabels(false);
+        $v->rule('required', 'name');
+        $v->validate();
+        $this->assertSame(array("is required"), $v->errors('name'));
+    }
+
     public function testAccurateErrorMessageParams()
     {
         $v = new Validator(array('num' => 5));