Given an HTML type array field "example[key1][key2][key3]" breaks up the keys so that they could be used to reference a regular PHP array.
Using an array of keys iterate through the array following the keys to find the final key value. If a value is passed then set that value.
Gets a form variable from GET or POST data, stripped of magic quotes if necessary. If the variable is somehow set in both the GET data and the POST data, the value from the POST data will be returned and the GET value will be ignored.
Gets a form variable from GET data, stripped of magic quotes if necessary. This function will NOT return a POST variable.
Utility function to obtain PATH_INFO information.
Gets a form variable from POST data, stripped of magic quotes if necessary. This function will NOT return a GET variable.
Returns a rectangle of a two-dimensional array.
Determines the location of the system temporary directory.
Creates a temporary filename for the lifetime of the script, and (optionally) register it to be deleted at request shutdown.