What is the null in php?

Null in php?

Hi Prabeen,
Null is a special data type which can have only one value, which is itself. Which is to say, null is not only a data type, but also a keyword literal. A variable of data type null is a variable that has no value assigned to it. When a variable is created without a value, it is automatically assigned a value of null. This is so that whatever garabage was in that memory location before is cleared out. Otherwise the program may try to process it.