title: Laravel 5.2 custom validation error message with parameter
body: <p>I am pretty sure I am missing just something small, but damn-hell can't figure it out.. please help me guys :)</p>
  
  <p>I've extended <strong>AppServiceProvider.php</strong></p>
  
  <pre><code>public function boot()
      {
          //
          Validator::extend('ageLimit', 'App\Http\CustomValidator@validateAgeLimit');
      }
  </code></pre>
  
  <p>I've created new <strong>CustomValidator.php</strong></p>
  
  <pre><code>&lt;?php
  
  namespace App\Http;
  use DateTime;
  
  class CustomValidator {
  
      public function validateAgeLimit($attribute, $value, $parameters, $validator)
      {
          $today = new DateTime(date('m/d/Y'));
          $bday  = new DateTime($value);
  
          $diff = $bday-&gt;diff($today);
          $first_param = $parameters[0];
  
          if( $diff-&gt;y &gt;= $first_param ){              
              return true;
          }else{
            return false;
          }
  
      }
  
  }
  </code></pre>
  
  <p>I've added new line to <strong>validation.php</strong></p>
  
  <pre><code>/*
  |--------------------------------------------------------------------------
  | Custom Validation Language Lines
  |--------------------------------------------------------------------------
  | 
  | Here you may specify custom validation messages for attributes using the
  | convention "attribute.rule" to name the lines. This makes it quick to
  | specify a specific custom language line for a given attribute rule.
  |
  */
  'age_limit' =&gt; ':attribute -&gt; Age must be at least :ageLimit years old.',
  
  'custom' =&gt; [
      'attribute-name' =&gt; [
          'rule-name' =&gt; 'custom-message',
      ],
  ],  
  </code></pre>
  
  <p>Here comes my rule:</p>
  
  <pre><code>'birth_date' =&gt; 'required|date|ageLimit:15', 
  </code></pre>
  
  <p>All of this works ok ... excluded the parameter :ageLimit in validation.php file ..</p>
  
  <p>How can I get there the parameter 15 I am passing in rule ??? </p>
  
  <p>Because I am getting this message:</p>
  
  <pre><code>Birth day -&gt; Age must be at least :ageLimit years old.
  </code></pre>
  
  <p>And certainly, I would like to get this:</p>
  
  <pre><code>Birth day -&gt; Age must be at least 15 years old.
  </code></pre>