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Fatal error: Uncaught TypeError: array_search(): Argument #2 ($haystack) must be of type array, null given in /usr/home/simsung/www/igc/lib/class/igcTimeTable.class.php:624 Stack trace: #0 /usr/home/simsung/www/igc/lib/class/igcTimeTable.class.php(624): array_search(NULL, NULL) #1 /usr/home/simsung/www/igc/lib/class/igcTimeTable.class.php(97): IgcTimeTable->time_mapping(NULL, NULL) #2 /usr/home/simsung/www/igc/module/lect_detail.php(138): IgcTimeTable->getPopStartTime(NULL, NULL) #3 /usr/home/simsung/www/igc/detail.php(1): include('/usr/home/simsu...') #4 {main} thrown in /usr/home/simsung/www/igc/lib/class/igcTimeTable.class.php on line 624