PHP Interview Questions
Questions Answers Views Company eMail

What is the functionality of the function html entities?

3 6688

How can we get second of the current time using date function?


2 14005

How can we convert the time zones using PHP?

1 9453

What is meant by urlencode and urldocode?

2 6772

What is the difference between the functions unlink and unset?

TCS, Small Firm,

8 13617

How can we register the variables into a session?

1 4199

How can we get the properties (size, type, width, height) of an image using PHP image functions?


4 14692

How can we get the browser properties using PHP?

7 26188

What is the maximum size of a file that can be uploaded using PHP and how can we change this?

4 12111

How can we increase the execution time of a PHP script?

Photon, CyberBeoz, XTX,

12 26833

How can we take a backup of a mysql table and how can we restore it. ?

Oracle, Brain Infosys,

7 12801

How can we optimize or increase the speed of a mysql select query?

6 12272

How many ways can we get the value of current session id?

Infosys, SysBiz, L&T, Torque Infotech,

3 16636

How can we destroy the session, how can we unset the variable of a session?

5 8920

How can we destroy the cookie?

4 12981

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Un-Answered Questions { PHP }

what are the differences between php and perl


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


if you run the app program all vendor open items are cleared but is it possible to reverse the again again open items please tell me the answer


discuss the issue of software theft in ghana and how it has affected the economy


how to open & closing opening period in fico


write a prog using insert,update,delete in this manner as output? name: phno. add button phno. edit button delete button 2.


what is mean by portal


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.


how retrive the video file in php using video tag


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


Binary tree question - Node has numeric data (int) The function takes depth as argument and sum all the value of the node of the depth. For instance, (0) depth 0 / \ 10 20 depth 1 / \ / \ 40 50 60 70 depth 2 so if you pass get_sum(2), you would return 220 which is 40+50+60+70 (sum of depth2) write the function.


what is the scope of php in the future if any other language is developed then may be php is loss ???


what is difference between PHP4 , PHP5


How to get best php developer Experience in Php with Sugar CRM / VTiger.


what are interfaces and Abstart classes