The ____ function can be used to determine if a variable contains values.
A) empty()
B) blank()
C) is_null()
D) null

Question

Quizplus · Accepted Answer

The empty() function checks whether a variable is considered to be empty. If the variable has no value assigned to it, or if it has a value equivalent to false, it is considered empty. This makes it a good choice for determining if a variable contains any value. The blank() function does not exist in PHP. The is_null() function only checks if a variable is explicitly set to null, not if it has any other value. The value null is not a valid choice for this question as it is only a data type, not a function.

The ____ Function Can Be Used to Determine If a Variable