error saat insert session ke database mysql di php

 $insert = mysqli_query($koneksi,"INSERT INTO pendaftaran (id,no_ktp,email,no_hp,tgl_lahir,alamat,keperluan,tgl_daftar) VALUES (NULL,'$_SESSION['no_ktp']','$_SESSION['email']','$_SESSION['no_hp']','$tgl_lahir','$alamat','$keperluan',NOW()) ") or die(mysqli_error($koneksi));

saat eksekusi di atas muncul error : Parse error: syntax error, unexpected '"', expecting '-' or identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in C:\xampp\htdocs\session\step3_rjlama.php on line 9