// Generates a National Registration Identity Card (NRIC) number
echo $faker->nric(); // "S4098150J"
// Generates a Foreign Identification Number (FIN)
echo $faker->fin(); // "G2325088N"
// Generates either NRIC or FIN number depending on the second argument
echo $faker->singaporeId(new \DateTime('2005-03-01'), $faker->boolean()); // "T0550799A"