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

<script>
  var arg = 'T';
  var vehicle = ( ( arg == 'B' ) ? 'bus' :
		( arg == 'A' ) ? 'airplane' :
			( arg == 'T' ) ? 'train' :
				( arg == 'C' ) ? 'car' :
					( arg == 'H' ) ? 'horse' :
						'feet' );
  console.log(vehicle);
</script>