<?php $decimal = 12398; $binary = 0b10101; $binary_alt = 0B1001_0000_1111; $hex = 0x12AF; $hex_alt = 0X12_AF; $oct = 0o1234567; $oct_alt = 0O12_34_56_7; $oct_alt2 = 0777_555; $sci = 1.2e3; $sci2 = 7E-10;