The same problem which is occuring in this question is happening a lot to me: Warning "Do not Access Superglobal $_POST Array Directly" on Netbeans 7.4 for PHP
However - of course I take care with $_POST and user input etc. but I do this with custom functions which NetBeans does not understand and therefore my IDE is full of warnings.
Another annoying example: "Too many nested blocks in function declaration". Of course you should avoid that, but I think this is not always possible.
How can I disable single warnings in the Netbeans IDE while still keeping all other warnings?