Data Types in PHP

Question 1

What defines the type of data a variable can store in PHP?

Answer 1

Data Types

PHP allows eight different types of data types.

Question 2

How many simple data types are there in PHP?

Answer 2

Five

The first five data types are called simple data types.

Question 3

What is an Integer in PHP?

Answer 3

Whole numbers, both positive and negative

Example: $age = 25;

Question 4

What is a Float (Double) in PHP?

Answer 4

Numbers with decimal points

Example: $price = 19.99;

Question 5

What does the NULL data type represent in PHP?

Answer 5

A special type that can hold only one value, i.e., NULL

Example: $var = NULL;

Question 6

What is a String in PHP?

Answer 6

A sequence of characters enclosed in quotes

Example: $name = ‘John Doe’;

Question 7

What values can a Boolean hold in PHP?

Answer 7

TRUE or FALSE

Example: $isActive = true;

Question 8

What is an Array in PHP?

Answer 8

A compound data type that can store multiple values of the same data type

Example: $fruits = array(‘Apple’, ‘Banana’, ‘Cherry’);

Question 9

What are Objects in PHP?

Answer 9

Instances of user-defined classes that can hold both values and functions

Objects allow encapsulation of data and behavior.

Question 10

What are Resources in PHP?

Answer 10

Not an exact data type; used to store references to function calls or external PHP resources

Example: Consider a database call.