PHP is a Hypertext Preprocessor. This essentially means that PHP dynamically writes web pages for you. So it can query a database and print a report from it, or change CSS and such based on specific criteria.
The explode() function allows you to turn a String into an Array based on a separator you define. explode() https://www.php.net/manual/en/function.explode.php https://www.w3schools.com/php/func_string_explode.asp explode.php