PHP

Variables are the storage of different types of information. You cannot start with a number while declaring a variable and it starts...

File Handling is the most important part of web application. For different task you need to open and process a file.

fopen( ) function is also used to create a file. In PHP, by same function to open file, a file is also created using that...

It’s easy to upload your files to server but with ease it comes danger so be careful when allowing file uploads.

Its a small file that server insert on user’s computer. When the same computer requests a page with a browser, it will send cookie...

It is a way to store data for users against a session ID. Web Server has no idea who you are, has no idea whether you are logged in...