What is the correct syntax for the include function in PHP?

The include function in PHP is used to include and evaluate the specified file during the execution of a script. The correct syntax for the include function is as follows: include('filename.php'); where 'filename.php' is the name of the file you want to include. Make sure to use single quotes around the file name. This function helps in modularizing code and reusing common code across multiple files.

include('filename.php');