The include() function includes and evaluates the specified file. The include() statement takes all the contents of the specified file and copies it to the one which consist this statement.

Similarly the require() statement includes and evaluates the specified file. Both include() and require() works in same way, the only difference is how they handle failure. The include() statement produces warning, but the script will continue its execution. While the require() statement produces a Fatal Error and script stop its execution.