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  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_environment_initialize() (line 695 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_environment_initialize() (line 696 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_environment_initialize() (line 697 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_environment_initialize() (line 700 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_environment_initialize() (line 702 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 308 of /www/doc/www.peira.cz/www/sites/default/settings.php).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 309 of /www/doc/www.peira.cz/www/sites/default/settings.php).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 317 of /www/doc/www.peira.cz/www/sites/default/settings.php).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in include_once() (line 324 of /www/doc/www.peira.cz/www/sites/default/settings.php).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_settings_initialize() (line 819 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: ini_set(): Session ini settings cannot be changed after headers have already been sent in drupal_settings_initialize() (line 828 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: session_name(): Session name cannot be changed after headers have already been sent in drupal_settings_initialize() (line 831 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Deprecated function: Return type of DatabaseStatementBase::execute($args = [], $options = []) should either be compatible with PDOStatement::execute(?array $params = null): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2244 of /www/doc/www.peira.cz/www/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /www/doc/www.peira.cz/www/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /www/doc/www.peira.cz/www/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /www/doc/www.peira.cz/www/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /www/doc/www.peira.cz/www/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /www/doc/www.peira.cz/www/includes/database/database.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in _drupal_bootstrap_page_cache() (line 2706 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent in drupal_session_initialize() (line 242 of /www/doc/www.peira.cz/www/includes/session.inc).
  • Deprecated function: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in drupal_random_bytes() (line 2268 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: session_id(): Session ID cannot be changed after headers have already been sent in drupal_session_initialize() (line 266 of /www/doc/www.peira.cz/www/includes/session.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Deprecated function: Return type of DatabaseCondition::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 1652 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Optional parameter $type declared before required parameter $key is implicitly treated as a required parameter in include_once() (line 1389 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Deprecated function: Return type of DateObject::__wakeup() should either be compatible with DateTime::__wakeup(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 158 of /www/doc/www.peira.cz/www/sites/all/modules/date/date_api/date_api.module).
  • Deprecated function: Return type of DateObject::format($format, $force = false) should either be compatible with DateTime::format(string $format): string, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 158 of /www/doc/www.peira.cz/www/sites/all/modules/date/date_api/date_api.module).
  • Deprecated function: Return type of DateObject::setTimezone($tz, $force = false) should either be compatible with DateTime::setTimezone(DateTimeZone $timezone): DateTime, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 158 of /www/doc/www.peira.cz/www/sites/all/modules/date/date_api/date_api.module).
  • Deprecated function: Optional parameter $data declared before required parameter $name is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $data declared before required parameter $name is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $file declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $account declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $entity declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $account declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $values declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $view_mode declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Optional parameter $langcode declared before required parameter $entity_type is implicitly treated as a required parameter in require_once() (line 341 of /www/doc/www.peira.cz/www/includes/module.inc).
  • Deprecated function: Creation of dynamic property SelectQuery::$alterTags is deprecated in SelectQuery->addTag() (line 978 of /www/doc/www.peira.cz/www/includes/database/select.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.peira.cz/www/includes/bootstrap.inc:320) in drupal_send_headers() (line 1505 of /www/doc/www.peira.cz/www/includes/bootstrap.inc).
  • Deprecated function: Creation of dynamic property SelectQuery::$alterTags is deprecated in SelectQuery->addTag() (line 978 of /www/doc/www.peira.cz/www/includes/database/select.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property SelectQuery::$alterTags is deprecated in SelectQuery->addTag() (line 978 of /www/doc/www.peira.cz/www/includes/database/select.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property SelectQuery::$alterTags is deprecated in SelectQuery->addTag() (line 978 of /www/doc/www.peira.cz/www/includes/database/select.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in _filter_url_trim() (line 1664 of /www/doc/www.peira.cz/www/modules/filter/filter.module).
  • Deprecated function: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in url_is_external() (line 2393 of /www/doc/www.peira.cz/www/includes/common.inc).
  • Deprecated function: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in url_is_external() (line 2395 of /www/doc/www.peira.cz/www/includes/common.inc).
  • Deprecated function: ltrim(): Passing null to parameter #1 ($string) of type string is deprecated in url() (line 2311 of /www/doc/www.peira.cz/www/includes/common.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property SelectQuery::$alterTags is deprecated in SelectQuery->addTag() (line 978 of /www/doc/www.peira.cz/www/includes/database/select.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).
  • Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1865 of /www/doc/www.peira.cz/www/includes/database/query.inc).

We are a team of language teachers and leisure instructors. We have been organizing summer camp Peira since 2007. Although the camp is organized primarily by Czechs we cannot forget to mention the collaboration with colleagues from the Great Britain.
In terms of summer camp we use our long-time experience in teaching to offer an extraordinary and interesting side of the Czech Republic to children.