PHP Related Interview Questions
Questions Answers Views Company eMail

what are Implode and Explode functions?

HCL,

8 28795

How can we register the variables into a Session?

HCL, Star Computers, Trikon Networks,

7 29691

What is the difference between the functions UNLINK and UNSET?

Silicon Biztech,

8 21824

What are the different types of Errors in PHP?

Cisco, TCS, Troop Software,

20 60400

What is register_globals in php?

Castling IT, HCL, Intel Soft Solutions, Millennium,

6 24318

How can we submit a form without a submit buttom?

A1 Technology, IBM,

12 20994

What types images that php supports?

1 7794

How do you format and output a number with leading zero's?

3 11963

When you will get the error "Cannot add header information"?

2 5996

How to install PHP with --mcrypt and --mhash?

1 7425

How can you access a COM object from a PHP page?

1 4868

How do you get the Browser information?

Life Infotech,

3 9915

How can you parse files that were not ending with .php by using Apache?

1 5942

what method is used to generate a random number?

4 9266

How do you develop your own PHP extension ?

2 6471


Un-Answered Questions { PHP Related }

What are the data types in php?

519


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.

1713


How check field is empty or not in php?

517


What is drupal node?

114


How to update my joomla website?

64






What is Joomla Plugins?

111


How to retrieve values out of an array?

505


How to do environment configuration in laravel.

411


Is wordpress blog free?

117


What is explode() in php?

521


Is wordpress good for beginners?

93


Explain the types of string comparision function in PHP

491


What is use of header() function in php?

525


Which methods should be used for sending an email using the variables $to, $subject, and $body?

538


What is api used for?

462