PHP interview questions and answers for freshers

12/2/2014 PHP Interview questions and answers for freshers

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PHP interview questions PHP interview questions and answers for freshers
PHP News
Archives Welcome !!!. In this section we are providing you some frequently asked PHP
PHP Framework Interview Questions which will help you to win interview session easily. Candidates
PHP Tutorial must read this section,Then by heart the questions and answers. Also, review sample
answers and advice on how to answer these typical interview questions. PHP is an
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important part of the web world, and every web developer should have the basic
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knowledge in PHP.Common PHP interview questions, which should help you become a
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best PHP codder. We hope you find these questions useful. If you are an interviewer,
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Take the time to read the common interview questions you will most likely be asked.
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Articles 1. What is PHP?
Cakephp Overview
CodeIgniter Overview PHP is a server side scripting language commonly used for web applications. PHP
Yii Overview has many frameworks and cms for creating websites.Even a non technical person
Zend Overview can cretae sites using its CMS.WordPress,osCommerce are the famus CMS of
PHP Security php.It is also an object oriented programming language like java,C-sharp etc.It is
very eazy for learning

2. What is the use of "echo" in php?

It is used to print a data in the webpage, Example: <?php echo 'Car insurance'; ?
> , The following code print the text in the webpage

3. How to include a file to a php page?

We can include a file using "include() " or "require()" function with file path as its
parameter.

4. What's the difference between include and require?

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.

5. require_once(), require(), include().What is difference between them?

require() includes and evaluates a specific file, while require_once() does that
only if it has not been included before (on the same page). So, require_once() is
recommended to use when you want to include a file where you have a lot of
functions for example. This way you make sure you don't include the file more
times and you will not get the "function re-declared" error.

6. 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 .

7. How to declare an array in php?

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

8. 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');

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, 12/2/2014 PHP Interview questions and answers for freshers
print 'Job Interview ');

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

in_array used to checks if a value exists in an array

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

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

11. 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.

12. 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

13. How to set cookies in PHP?

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

14. How to Retrieve a Cookie Value?

eg : echo $_COOKIE["user"];

15. How to create a session? How to set a value in session ? How to Remove data
from a session?

Create session : session_start();
Set value into session : $_SESSION['USER_ID']=1;
Remove data from a session : unset($_SESSION['USER_ID'];

16. what types of loops exist in php?

for,while,do while and foreach (NB: You should learn its usage)

17. How to create a mysql connection?

mysql_connect(servername,username,password);

18. How to select a database?

mysql_select_db($db_name);

19. How to execute an sql query? How to fetch its result ?

$my_qry = mysql_query("SELECT * FROM `users` WHERE `u_id`='1'; ");
$result = mysql_fetch_array($my_qry);
echo $result['First_name'];

20. Write a program using while loop

$my_qry = mysql_query("SELECT * FROM `users` WHERE `u_id`='1'; ");
while($result = mysql_fetch_array($my_qry))
{
echo $result['First_name'.]."<br/>";
}

21. How we can retrieve the data in the result set of MySQL using PHP?
1. mysql_fetch_row
2. mysql_fetch_array
3. mysql_fetch_object
4. mysql_fetch_assoc
22. What is the use of explode() function ?


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