variable in single quotes

[rivka]

This is likely a very stupid question, but what is the difference between $POST['variable'] and $POST[variable] ?

When I use $POST['variable'] in an if statement, the value of the variable is recognized. If I use the second one ($POST[variable]) it is not. Can someone explain why?

[LordShryku]

$_POST[variable] is so not the way to do it. You need to quote it, because it's a literal. Newer PHP versions give a notice/error if you don't.