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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      // just allow an empty config
  10      protected $pattern = '/^(|[-]?[0-9]+(?:[-+*][0-9]+)*)$/';
  11  
  12      /**
  13       * @inheritdoc
  14       * Empty string is valid for numericopt
  15       */
  16      public function update($input) {
  17          if($input === '') {
  18              if($input == $this->local) return false;
  19              $this->local = $input;
  20              return true;
  21          }
  22  
  23          return parent::update($input);
  24      }
  25  }