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   1  <?php
   2  
   3  namespace dokuwiki\plugin\config\core\Setting;
   4  
   5  /**
   6   * Class setting_numericopt
   7   */
   8  class SettingNumericopt extends SettingNumeric
   9  {
  10      // just allow an empty config
  11      protected $pattern = '/^(|[-]?\d+(?:[-+*]\d+)*)$/';
  12  
  13      /**
  14       * @inheritdoc
  15       * Empty string is valid for numericopt
  16       */
  17      public function update($input)
  18      {
  19          if ($input === '') {
  20              if ($input == $this->local) return false;
  21              $this->local = $input;
  22              return true;
  23          }
  24  
  25          return parent::update($input);
  26      }
  27  }