- Courses
- Tutorials
- Practice
- Jobs
Variables & Data Types in PHP
Question 1
Which function is used to check the data type of a variable in PHP?
- A
gettype()
- B
var_type()
- C
checktype()
- D
type_of()
Question 2
What is the result of the following PHP code: $x = "10" + 5;?
- A
10
- B
15
- C
"105"
- D
Error
Question 3
Which of the following is not a scalar data type in PHP?
- A
integer
- B
float
- C
string
- D
array
Question 4
How do you declare a variable in PHP?
- A
$variable;
- B
var variable;
- C
let variable;
- D
declare variable;
Question 5
Which of the following is the correct way to declare a constant in PHP?
- A
define("PI", 3.14);
- B
const PI = 3.14;
- C
constant("PI", 3.14);
- D
Both a) and b)
Question 6
What is the default value of an uninitialized variable in PHP?
- A
null
- B
false
- C
0
- D
""(empty string)
Question 7
Which of the following is the correct way to declare a global variable in PHP?
- A
global $var;
- B
$GLOBALS['var'];
- C
global variable $var;
- D
Both a) and b)
Question 8
Which of the following is the correct way to create a null variable in PHP?
- A
$var = null;
- B
$var = "";
- C
$var = false;
- D
$var = undefined;
Question 9
How do you declare a floating-point variable in PHP?
- A
$var = "4";
- B
$var = 3.14;
- C
$var = 3,14;
- D
$var = float(3.14);
Question 10
What is the proper way to define an array in PHP?
- A
$arr = array(1, 2, 3);
- B
$arr = (1, 2, 3);
- C
$arr = [1, 2, 3];
- D
Both a) and c)
There are 10 questions to complete.