<?php
$arg = 'T';
$vehicle = ( ( $arg == 'B' ) ? 'bus' :
( $arg == 'A' ) ? 'airplane' :
( $arg == 'T' ) ? 'train' :
( $arg == 'C' ) ? 'car' :
( $arg == 'H' ) ? 'horse' :
'feet' );
echo $vehicle;
PD9waHAKCiRhcmcgPSAnVCc7CiR2ZWhpY2xlID0gKCAoICRhcmcgPT0gJ0InICkgPyAnYnVzJyA6CiAgICAgICAgICAgICAoICRhcmcgPT0gJ0EnICkgPyAnYWlycGxhbmUnIDoKICAgICAgICAgICAgICggJGFyZyA9PSAnVCcgKSA/ICd0cmFpbicgOgogICAgICAgICAgICAgKCAkYXJnID09ICdDJyApID8gJ2NhcicgOgogICAgICAgICAgICAgKCAkYXJnID09ICdIJyApID8gJ2hvcnNlJyA6CiAgICAgICAgICAgICAnZmVldCcgKTsKZWNobyAkdmVoaWNsZTs=