bug fix.some update

Author: xiajianjun

document.md

@@ -69,7 +69,7 @@ run: `composer update`
             ];
         }
         
-        // custom validator message
+        // custom validator message, more {@see ValidatorTrait::defaultMessages()}
         public function messages()
         {
             return [
@@ -81,7 +81,7 @@ run: `composer update`
 //
 //  use, at other class
 
-$valid = Validator::make($_POST,)->validate();
+$valid = PageRequest::make($_POST,)->validate();
 if ( $valid->fail() ) {
     return $valid->getErrors();
 }
@@ -186,7 +186,7 @@ validator | description | rule example
 `required`  | validate required | `['tagId,userId', 'required' ]`
 `length`    | validate length | ....
 `size`  | validate size | `['tagId', 'size', 'min'=>4, 'max'=>567]`
-`min`   | validate min | `['title', 'min', 'min' => 40],`
+`min`   | validate min | `['title', 'min', 'value' => 40],`
 `max`   | validate max | ....
 `in`    | validate in | ....
 `string`    | validate string | ....

src/ValidatorTrait.php

@@ -315,7 +315,7 @@ public function firstError()
     {
         $e =  $this->_errors;
 
-        return array_shift($e);
+        return array_values(array_shift($e))[0];
     }
 
     /**
@@ -328,7 +328,7 @@ public function lastError()
     {
         $e =  $this->_errors;
 
-        return array_pop($e);
+        return array_values(array_pop($e))[0];
     }
 
     /**
@@ -349,9 +349,9 @@ public function defaultMessages()
             'required' => '{attr} is not block!',
             'length' => '{attr} length must at rang {min} ~ {max}',
             'size'  => '{attr} must be an integer and at rang {min} ~ {max}',
-            'min'   => '{attr} minimum boundary is {min}',
-            'max'   => '{attr} maximum boundary is {max}',
-            'in'    => '{attr} must in {range}',
+            'min'   => '{attr} minimum boundary is {value}',
+            'max'   => '{attr} maximum boundary is {value}',
+            'in'    => '{attr} must in ({value})',
             'string' => '{attr} must be a string',
             'isArray' => '{attr} must be an array',
             'callback' => 'The custom callback validation fails of the [{attr}]!',
@@ -386,7 +386,7 @@ public function getMessage($name, array $params, $rule = [], $msg=null)
         $params['{attr}'] = isset($trans[$attrName]) ? $trans[$attrName] : $attrName;
 
         foreach ($rule as $key => $value) {
-            $params['{' . $key . '}'] = $value;
+            $params['{' . $key . '}'] = is_array($value) ? implode(',', $value) : $value;
         }
 
         return strtr($msg, $params);