- In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.
- If it returns True the given variable is null, otherwise it returns False.
- If the value of $x is equal to NULL it returns true and it is an identical comparison operator.
- In PHP null is a special data type which can have only one value that is NULL.
- NULL data type is a variable that has no value assigned to it and then any variable can be empty by setting the value NULL to the variable.
Sample Code
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