User:Ottomata/PHP False

First the output:

NULL          == false isset(NULL)   == false empty(NULL)   == true

false         == false isset(false)  == true empty(false)  == true

''            == false isset('')     == true empty('')     == true

0             == false isset(0)      == true empty(0)      == true

'0'           == false isset('0')    == true empty('0')    == true

'0000'        == true isset('0000') == true empty('0000') == false

array       == false isset(array) == true empty(array) == true

And here's the code to output this: