PHP Interview Questions and Answers

What is PHP?
The PHP Hypertext Preprocessor is a programming language that allows web developers to create dynamic content that interacts with databases. PHP is basically used for developing web based software applications.
What are the differences between Get and post methods?
There are some defference between GET and POST method 1. GET Method have some limit like only 2Kb data able to send for request But in POST method unlimited data can we send 2. when we use GET method requested data show in url but Not in POST method so POST method is good for send sensetive request
What are the differences between require and include?
Both include and require used to include a file but when included file not found Include send Warning where as Require send Fatal Error .
What is use of header() function in php ?

The header() function sends a raw HTTP header to a client.We can use header() 
function for redirection of pages. It is important to notice that header() must
be called before any actual output is seen.

What is meant by nl2br()?

Inserts HTML line breaks (<BR />) before all newlines in a strin

How we get IP address of client, previous reference page etc ?
How can we register the variables into a session?
$_SESSION['name'] = 'me';

What are the different types of error in php?

three basic types of runtime errors in PHP:

1. Notices: These are trivial, non-critical errors that PHP encounters while executing a
script for example, accessing a variable that has not yet been defined.
By default, such errors are not displayed to the user at all although 
you can change this default behavior.

2. Warnings: These are more serious errors for example, attempting to include() a file 
which does not exist. By default, these errors are displayed to the user, but they do 
not result in script termination.

3. Fatal errors: These are critical errors  for example, instantiating an object of a non-existent class,
or calling a non-existent function. These errors cause the immediate termination of the script, and PHP 
default behavior is to display them to the user when they take place.

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What is the value of cot 4π/3 ?

Indian Politics

Article-24 of the Indian Constitution ‘Prohibition of employment of children in factories, etc’ deals with?

Article-134A of the Indian Constitution ‘Certificate for appeal to the Supreme Court’ deals with?


Who invented Aspirin?


A larger force on a rotating body results in larger?

What is the unit of the physical quantity, magnetic flux density?


The system of equations 2x + 4y = 6 and 4x + 8y = 8 is ?

Time and Distance

A thief is spotted by a policeman from a distacne of 100 m. When the policeman starts the chase, the thief also starts running. If the speed of the theif is 8 km / hour and that of the policeman is 10 km/hour, then how far will the theif have to run before he is overtaken?


Aman and Alok attempted to solve a quadratic equation. Aman made a mistake in writing down the constant term and ended up in roots (4, 3). Alok made a mistake in writing down the coefficient of x to get roots (3, 2). The correct roots of the equation are?

Compound Interest

The effective annual rate of interest corresponding to a nominal rate of 22% per annum payable half-yearly is?

Volume and Surface Area

If the volume of a cylinder is 2156 cubic cm and height is 14 cm, find its radius?


What is the equation of the line which passes through the points (2, 3) and (- 4, 1)?


In △ABC, the angle bisector of ∠A cuts BC at E. Find length of AC, if lengths of AB, BE and EC are 9 cm, 3.6 cm and 2.4 cm?

In a triangle, the length of the opposite side of the angle which measures 45° is 8√2 cm, what is the length of the side opposite to the angle which measures 90°?

General Knowledge of India

The boundary line between India and Pakistan is called?

Which city is located on the banks of the river Mahanadi?

Indian History

When was the battle of Haldighati fought?

In 1498, which Portuguese explorer discovered a new sea route from Europe to India?

General Knowledge of India

Chapchar Kut is a festival of which State?


In chemistry, soap is a salt of a ?

Indian Economy

Which of the following is a Direct tax?


Sauria lacertidae is the scientific name of?

Which of the following is a primary function of haemoglobin?


A factory buys 8 machines.3 Machine A, 2 Machine B and rest Machine C. Prices of the machines are 100000, 80000 and 45000 respectively.Calculate the average cost of these machines?


Ticket for an adult is 500 and a child is 200. 1 child goes free with two adults. If a group has 20 adults and 8 children what will be the discount the group get?