Magic string
Input which activates otherwise hidden functionality / From Wikipedia, the free encyclopedia
In computer programming, a magic string is an input that a programmer believes will never come externally and which activates otherwise hidden functionality. A user of this program would likely provide input that gives an expected response in most situations. However, if the user does in fact innocently provide the pre-defined input, invoking the internal functionality, the program response is often quite unexpected to the user (thus appearing "magical").[1]
Not to be confused with Magic number (programming) or Magic string (therapeutic aid).