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   1  <?php
   2  
   3  /*
   4   * This file is part of Mustache.php.
   5   *
   6   * (c) 2010-2017 Justin Hileman
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  /**
  13   * Unknown helper exception.
  14   */
  15  class Mustache_Exception_UnknownHelperException extends InvalidArgumentException implements Mustache_Exception
  16  {
  17      protected $helperName;
  18  
  19      /**
  20       * @param string    $helperName
  21       * @param Exception $previous
  22       */
  23      public function __construct($helperName, Exception $previous = null)
  24      {
  25          $this->helperName = $helperName;
  26          $message = sprintf('Unknown helper: %s', $helperName);
  27          if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
  28              parent::__construct($message, 0, $previous);
  29          } else {
  30              parent::__construct($message); // @codeCoverageIgnore
  31          }
  32      }
  33  
  34      public function getHelperName()
  35      {
  36          return $this->helperName;
  37      }
  38  }