Why print_r is used in php?
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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 ?
What is the difference between $var and $$var?
What is == and === in php?
What is data structure in php?
Tell me what are the functions to be used to get the image's properties (size, width and height)?
How to get ip address of clients machine?
Write a program to display a table of any given number?
What is static variable in php?
Are objects passed by value or by reference?
How to find a length of a string in php?
Which of the delimiter is ASP style?
How can we make a constant in php?