original_string: private function option_checkbox($name, $on, $label) {
          if ($on) {
              $checked = ' checked="checked"';
          } else {
              $checked = '';
          }
          $name = 'userselector_' . $name;
          // For the benefit of brain-dead IE, the id must be different from the name of the hidden form field above.
          // It seems that document.getElementById('frog') in IE will return and element with name="frog".
          $output = '<div class="form-check"><input type="hidden" name="' . $name . '" value="0" />' .
                      '<label class="form-check-label" for="' . $name . 'id">' .
                          '<input class="form-check-input" type="checkbox" id="' . $name . 'id" name="' . $name .
                              '" value="1"' . $checked . ' /> ' . $label .
                      "</label>
                     </div>\n";
          user_preference_allow_ajax_update($name, PARAM_BOOL);
          return $output;
      }
code: private function option_checkbox($name, $on, $label) {
          if ($on) {
              $checked = ' checked="checked"';
          } else {
              $checked = '';
          }
          $name = 'userselector_' . $name;
          // For the benefit of brain-dead IE, the id must be different from the name of the hidden form field above.
          // It seems that document.getElementById('frog') in IE will return and element with name="frog".
          $output = '<div class="form-check"><input type="hidden" name="' . $name . '" value="0" />' .
                      '<label class="form-check-label" for="' . $name . 'id">' .
                          '<input class="form-check-input" type="checkbox" id="' . $name . 'id" name="' . $name .
                              '" value="1"' . $checked . ' /> ' . $label .
                      "</label>
                     </div>\n";
          user_preference_allow_ajax_update($name, PARAM_BOOL);
          return $output;
      }
code_tokens: private function option_checkbox ( $ name , $ on , $ label ) { if ( $ on ) { $ checked = ' checked="checked"' ; } else { $ checked = '' ; } $ name = 'userselector_' . $ name ; // For the benefit of brain-dead IE, the id must be different from the name of the hidden form field above. // It seems that document.getElementById('frog') in IE will return and element with name="frog". $ output = '<div class="form-check"><input type="hidden" name="' . $ name . '" value="0" />' . '<label class="form-check-label" for="' . $ name . 'id">' . '<input class="form-check-input" type="checkbox" id="' . $ name . 'id" name="' . $ name . '" value="1"' . $ checked . ' /> ' . $ label . "</label>
                     </div>\n" ; user_preference_allow_ajax_update ( $ name , PARAM_BOOL ) ; return $ output ; }
docstring: Output one of the options checkboxes.
  
  @param string $name
  @param string $on
  @param string $label
  @return string
docstring_tokens: Output one of the options checkboxes .