PHP reads array from file as configuration file

You may have seen many open source products. Most of their configuration files are stored in a separate file, and this file only stores an array. In fact, a little PHP trick is used here, that is, the file can be Include it and assign it to a variable. This variable will have the entire configuration array. Let me give you an example:
config.php
--------------- -----------

return array(
                                                                                                       ' ' c' => 3,
);
?>
getconfig.php
-------------------------- ---

$config = require('config.php');
print_r($config);
?>
Everyone try it and you will find $ The config variable stores the array in config.php. This is how PHP can use the file as a return function.
The above introduces PHP to read the array in the file as the configuration file, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.