Исключение / ошибка (TypeError)

preg_match(): Argument #2 ($subject) must be of type string, array given

/widgetcontrollers/souvenirs/wsouvenirspage.class.php (223)

#0 /var/www/printdesign/data/www/new.printdesign.ru/widgetcontrollers/souvenirs/wsouvenirspage.class.php(223): preg_match('/^(\\w+)_(asc|de...', Array, NULL)
#1 /var/www/printdesign/data/www/new.printdesign.ru/widgetcontrollers/souvenirs/wsouvenirspage.class.php(40): WSouvenirsPage->_parseSortOrder(Array)
#2 /var/www/printdesign/data/www/new.printdesign.ru/core/common/widgetcontroller.class.php(53): WSouvenirsPage->_construct()
#3 /var/www/printdesign/data/www/core/common/pagecontroller.class.php(163): WidgetController->__construct('souvenirs_page')
#4 /var/www/printdesign/data/www/new.printdesign.ru/pagecontrollers/souvenirs/psouvenirspage.class.php(26): Common\PageController->createWidget('WSouvenirsPage', 'souvenirs_page')
#5 /var/www/printdesign/data/www/new.printdesign.ru/index.php(30): PSouvenirsPage->produce()
#6 {main}