The recursive function stripslashesDeep($value) will (upon called) strip slashes (\) from strings and arrays (even arrays with arrays within themself). The controlstatement (if) checks if magic quotes gpc is on, if it is we strip the slashes it have added.

Very good snippet if you want to have the "same" input even if you switch to an enviroment where magic quotes gpc is set to something else than on your originall server.