PHP Interview Questions

*).Difference between get and post methods?
*).Who is the father of PHP?
*)what is the difference between $sno and $$sno
*)How can i destroy the cookie?
*)Different type of errors in PHP?
*)Difference between include and include_once?
*)Difference between include and require
*)How can we submit a form with out submit button?
*)What does a special set of tags <?= and ?> do in PHP?
*)How do you define a constant?
*)How do you pass a variable by value?
*)How can i display variable with value and datatype?
*)How can i check whether the variable is set with value or not?
*)How can i remove the variable value?
*)I want to combine two variables together:
 $var1 = 'Welcome to ';
 $var2 = 'Zend Technologies';
What will work faster? Code sample 1:
$var 3 = $var1.$var2;
Or code sample 2:
$var3 = "$var1$var2";
*)Conditions to check whether the variable is null or not?
*)What are the print functions we have in php?
*)Configuration directive to change the sessions path in web server?
*)what are the differences between cookies and sessions?
*)How many types of cookies we have?
*)How can i destroy the sessions?
*)What is the name of the cookie in client system to store session id?
*)what is session?
*)what is sessionid?
*)Function to move the uploaded file from one location to another location?
*)What is the configuration directive to initilize the sessions when request start up?
*)PHP Script to add the numbers of two text boxes and displays them in third textbox?
*)Is php cross platform?
*)What is ZEND Engine?
*)What is form tag?
*)How can i find out the IP address of client?
*)configuration directive to stop the file uploads?
*)What is web server?
*)How can i change the document root from c:/xampp/htdocs to d:/myfiles?