UPGRADE SISTEM PENGAJUAN CUTI KARYAWAN BERBASIS PLATFORM PHP FRAMEWORK CODEIGNITER PADA KRAKATAU IT. J. Insan Unggul [Internet]. 2026 Apr. 1 [cited 2026 Jul. 1];14(1):25-37. Available from: https://jurnal-iu.sttikom-iu.ac.id/index.php/01/article/view/191