Online PHP editor | refs for i8W2a

<?php namespace Foo { define('Foo\\null', true, true); define('Foo\\false', true, true); define("Foo\\M_PI", 3, true); //rounded off to be a nice clean number echo 'null:';if (null) echo "TRUE";else echo "FALSE"; echo ' false:';if (false) echo "TRUE";else echo "FALSE"; echo ' true:';if (true) echo "TRUE";else echo "FALSE"; echo ' M_PI:'.M_PI.' pi():'.pi(); }