PHP Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

PHP Interview Questions

Questions Answers Views Company eMail

How can we do user authentication without using session/cookies ? For ex:- From page1 accepts user name and password and need to check in all other pages whether the user has logged in or not

TCS,

6 11925

1.Where are the sessions storing ? 2.What are the contents of a session file ? 3.If the server is loaded with too many session files there is a possibility of server crash. How can we solve this issue? 4. How does php server identify that the particular session belongs to particular user ? For ex: If two users A and B logged from different machine, separate session files (say 1 and 2) will be created in the server. But how the php knows that 1 belongs to A and 2 belongs to B ?

PA Consulting, TCS,

4 9793

1.Where are the cookies storing ? 2.What is the drawback of using cookies ? 3. If two site is having same cookie name and different values what will be the output if we echo the cookie name from those sites ? How can we solve this issue (How can we specify the domain name)?

TCS,

8 16896

Whether session will work if we disable cookies in client browser ?

10 22982

1. Write a function to swap two values ? $a = 10; $b = 20; echo $a, $b; swap(); // If u want u can pass parameters echo $a, $b; // It should print 20 , 10

Aquasol, Infosys, TCS, Torque Infotech,

14 40326

This question is regarding version control. If two developers are committing the same php file at same time what will happen ? What error it will show (if any) ?

TCS,

2 7015

What is the difference between include and include_once ? Which is one is good in terms of performance ?

Dest,

2 6050

What is the difference between mysql_connect and mysql_pconnect ? Which one is good in terms of performance ?

4 12745

How session works (internal processing of session) ?

ASD Lab, IPSR Solutions,

3 11303

Does not want to see PHPSESSID in the url. How can be done this ?

3 7114

How to check whether cookies are disbled or not in the browser ? If that is the case how do you handle the sessions ?

1 4363

What is serialization / object serialization ?

2 5801

What is the purpose of destructor ?

2 6137

Whether site will complete the execution of the script if Fatal error occurs ?

1 3772

when ever the user logged in the database table the current registered date will be appeared

3 5552

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Un-Answered Questions { PHP }

How to reset/destroy a cookie?

1224

What is the use of ajax in php?

1044

How does php sessions work?

995

What is the difference between single-quoted and double-quoted strings in php?

1186

What is the meaning of die in php?

1061

Does php have block scope?

1019

Write a php script to get the largest key in an array?

1091

is that "enumerated array" equal to "numeric array"?

2559

What is alias in php?

1098

What are the different types of PHP arrays?

1130

What is meant by an associative array?

1049

What is use of echo in php?

996

How can I prevent sql-injection in php?

1102

Explain what are the two main string operators?

1014

How can we display information of a variable and readable by a human with php?

1017

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