Variables & Data Types in PHP

This section covers the questions for Variables and Data Types to clear all your concepts in PHP.

Last Updated :
Discuss
Comments

Question 1

Which function is used to check the data type of a variable in PHP?

  • gettype()

  • var_type()

  • checktype()

  • type_of()

Discuss it

Question 2

What is the result of the following PHP code: $x = "10" + 5;?

  • 10

  • 15

  • "105"

  • Error

Discuss it

Question 3

Which of the following is not a scalar data type in PHP?

  • integer

  • float

  • string

  • array

Discuss it

Question 4

How do you declare a variable in PHP?

  • $variable;

  • var variable;

  • let variable;

  • declare variable;

Discuss it

Question 5

Which of the following is the correct way to declare a constant in PHP?

  • define("PI", 3.14);

  • const PI = 3.14;

  • constant("PI", 3.14);

  • Both a) and b)

Discuss it

Question 6

What is the default value of an uninitialized variable in PHP?

  • null

  • false

  • 0

  • "" (empty string)

Discuss it

Question 7

Which of the following is the correct way to declare a global variable in PHP?

  • global $var;

  • $GLOBALS['var'];

  • global variable $var;

  • Both a) and b)

Discuss it

Question 8

Which of the following is the correct way to create a null variable in PHP?

  • $var = null;

  • $var = "";

  • $var = false;

  • $var = undefined;

Discuss it

Question 9

How do you declare a floating-point variable in PHP?

  • $var = "4";

  • $var = 3.14;

  • $var = 3,14;

  • $var = float(3.14);

Discuss it

Question 10

What is the proper way to define an array in PHP?

  • $arr = array(1, 2, 3);

  • $arr = (1, 2, 3);

  • $arr = [1, 2, 3];

  • Both a) and c)

Discuss it
Tags:
Misc

There are 10 questions to complete.

Take a part in the ongoing discussion
We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy