* MAIN_USE_OLD_SEARCH_FORM => Display the old search form in left menu
* MAIN_USE_OLD_SEARCH_FORM => Display the old search form in left menu
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* MAIN_SERVER_TZ => If you can't set timezone of your PHP, set this constant. Better is to set it to UTC. In future, this constant will be forced to 'UTC' so PHP server timezone will not have effect anymore. Examples : Europe/Paris, auto.