In order to use PHP … How does PHP work? Download and install XAMPP on your computer. This can be a relative pathname if the file is located next to … In PHP Language variables are case sensitive. When exit is used it will stop code-execution completely and exit PHP. In PHP Language variables name starts with _____ 8. You can do it through php.ini file or PHP script. Server Side Scripting. Most scripts will work smoothly in either environment, with the exception of scripts covered in the chapter "Alternative PHP uses", which require specific environments. Pass the pathname of the PHP script to be executed in the scriptPath parameter. The program shown below is a basic PHP application that outputs the words “Hello World!” When viewed in a web browser. For Linux, you don't need to type the whole path to the PHP … You should use return when you want to send a value back to the calling location, and exit when you want PHP to stop executing the rest of your script.