How do I examine defined constants in PHP?

Question

I\'m stepping through the source code of CodeIgniter with Xdebug in NetBeans and I\'m looking for a way to see defined constants as they are defined. If it\'s not possible,

Answer 1

This kind of practice I use is quite decent as it shows only custom/user created constants.

print_r(var_export(get_defined_constants(true)['user'], true));

Wrap this within pre tags or just view source and you'll get very nice array of all the stuff You defined.

Note that this is not going to work with php 5.3.* where in 5.4.* it outputs fine.

In earlier versions of php, get_defined_constants() must be assigned to a variable first, before output. Something like this.

$gdc = get_defined_constants(true);
print_r( var_export($gdc['user'], true) );