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   1  <?php
   2  
   3  namespace dokuwiki\plugin\config\core\Setting;
   4  
   5  /**
   6   * Class setting_regex
   7   */
   8  class SettingRegex extends SettingString {
   9  
  10      protected $delimiter = '/';    // regex delimiter to be used in testing input
  11      protected $pregflags = 'ui';   // regex pattern modifiers to be used in testing input
  12  
  13      /** @inheritdoc */
  14      public function update($input) {
  15  
  16          // let parent do basic checks, value, not changed, etc.
  17          $local = $this->local;
  18          if(!parent::update($input)) return false;
  19          $this->local = $local;
  20  
  21          // see if the regex compiles and runs (we don't check for effectiveness)
  22          $regex = $this->delimiter . $input . $this->delimiter . $this->pregflags;
  23          $lastError = error_get_last();
  24          @preg_match($regex, 'testdata');
  25          if(preg_last_error() != PREG_NO_ERROR || error_get_last() != $lastError) {
  26              $this->input = $input;
  27              $this->error = true;
  28              return false;
  29          }
  30  
  31          $this->local = $input;
  32          return true;
  33      }
  34  }