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 6669

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 ?

TCS, PA Consulting,

4 5364

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 10402




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

10 13983

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

Infosys, TCS, Torque Infotech, Aquasol,

14 24424

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 4055

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

Dest,

2 3836

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

4 9440




How session works (internal processing of session) ?

ASD Lab, IPSR Solutions,

3 8541

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

3 4102

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

1 2514

What is serialization / object serialization ?

2 3355

What is the purpose of destructor ?

2 3599

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

1 1867

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

3 2538


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Un-Answered Questions { PHP }

4 down vote favorite share [g+] share [fb] share [tw] I am developing my site using server side sessions using redis as backend for saving the session. Now the issue which is bothering me is of user leaving the website without logging out. I mean user simply closes the browser which causes the cookie to be deleted. Now session of that user still exists on the server and will not be used again as new login requires creating a new session due to security reasons. To avoid the case where hacker steals the old cookie and use it after user login again with same old session id. In essence user leaves the website without explicitly logging out and his session will be deleted after certain time limit of inaccessibility. I am thinking time limit of 30-60 minutes. Also with every new request from user his cookie will also be updated to keep track of when the user last time accessed the site. But nowadays, people let site remain open for long time without accessing it. For example users open facebook and gmail in new tabs and forget about them for 2-3 hours and still they are not asked to login again. Is letting a 2-3 hours old cooke access the session secure? My concern is someone steals user cookie and use it 2-3 hours later. Thinking on this topic has also forced me to question how facebook manages security if user can use a session where they are not accessing it for long periods of time and still they remain logged in. Or is it not secure for me to keep logged in when am not accessing the site session for longer period of time? It can be the case also there is some pinging mechanism using which sites keep track of user having their site open in a browser and when browser closes they are notified and can work accordingly. My website is a social network and needs all those security and usage features which a social network may need. I am new to web security and web development in general and may be the case where my above questions may seem a little basic. If you feel that is the case kindly point to some good reference where I can read and find answers to my question.

1110


iam mca post graduate in 2010 not getting job in JAVA so iam looking for carear in php as market demand is high so it is best option to try for php or not

775


am from coimbatore.am learning php&mysql. what will be the approx salary for me if i get a job in coimbatore.

904


armstrong number by using php while number is given by the keyboard.?

998


Maine 12th ke bad 2 years ka web designing ka course kiya hai. Php me achcha hu. Ek fresher ko is field me kitna mil sakta hai ?

4032






can we swap two different string using php for example:-- before swapping:-- 1 string :-hello friend, 2 string :-my dear, after swapping that strings will be: 1.hello dear, 2.my friend.

2335


How to genrate report in wordpress cms

1074


What is different between software and app

518


How I can control asset documents without GR/IR?

504


What is mean tnq

254


what is constructor

337


Hello Friends,I am seeking for a job in php having 9 months. exp.Please suggest any company openings.

1015


Which have the fastest execution between mysql_fetch_array() and mysql_fetch_assoc()

1109


What is session and Cokkies . How it works . tell some thing about Session_id()

876


What is polymorphism?

1353