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        $nama_file = "";
        if (!empty($_FILES["input_file"]["name"])) {
            if ($_FILES["input_file"]["error"] !== UPLOAD_ERR_OK) {
                die("Upload error: " . $_FILES["input_file"]["error"]);
            }
            
            $upload_path = realpath(__DIR__ . "/../../uploads/");
            echo "Resolved upload path: " . $upload_path . "<br>";
        
            // Periksa apakah folder upload benar-benar ada dan dapat ditulis
            if (!is_dir($upload_path) || !is_writable($upload_path)) {
                die("Upload directory does not exist or is not writable.");
            }
        
            // Cek apakah file sementara ada
            if (!file_exists($_FILES["input_file"]["tmp_name"])) {
                die("Temporary file does not exist.");
            }
        
            $nama_file = uniqid() . "-" . basename($_FILES["input_file"]["name"]);
            $final_path = $upload_path . "/" . $nama_file;
        
            // Pindahkan file
            if (!move_uploaded_file($_FILES["input_file"]["tmp_name"], $final_path)) {
                echo "Failed to move the uploaded file.<br>";
                print_r(error_get_last());
                exit();
            } else {
                echo "File successfully uploaded and moved to final location.";
            }
        }