IGNOU BCA MCA Students - VIVA Question Answer for PHP Part II

IGNOU BCA MCA Students - VIVA Question Answer for PHP

PHP Selected Question Answer - PART II

1.  Differences between GET and POST methods ?

We can send 1024 bytes using GET method but POST method can transfer large amount of data and POST is the secure method than GET method .

2.  How to declare an array in php?

Eg : var $arr = array('apple', 'grape', 'lemon');

3.  What is the use of 'print' in php?

This is not actually a real function, It is a language construct. So you can use with out parentheses with its argument list.
Example print('PHP Interview questions'); 
print 'Job Interview ');

4.  What is use of in_array() function in php ?

in_array used to checks if a value exists in an array

5.  What is use of count() function in php ?

count() is used to count all elements in an array, or something in an object

6.  What’s the difference between include and require?

It’s how they handle failures. If the file is not found by require(), it will cause a fatal error and halt the execution of the script. If the file is not found by include(), a warning will be issued, but execution will continue.

7.  What is the difference between Session and Cookie?

The main difference between sessions and cookies is that sessions are stored on the server, and cookies are stored on the user’s computers in the text file format. Cookies can not hold multiple variables,But Session can hold multiple variables.We can set expiry for a cookie,The session only remains active as long as the browser is open.Users do not have access to the data you stored in Session,Since it is stored in the server.Session is mainly used for login/logout purpose while cookies using for user activity tracking

8.  How to set cookies in PHP?

Setcookie("sample", "ram", time()+3600);

9.  How to Retrieve a Cookie Value?

eg : echo $_COOKIE["user"];