What is the purpose of the cs_clear function in the PHP code provided?

The cs_clear function in the PHP code provided is used to clear the contents of a specific cache file. This function is helpful in scenarios where you need to delete the cached data to ensure that the most up-to-date information is being displayed to users. To implement this function, you can simply open the cache file using the file_put_contents function and write an empty string to it, effectively clearing its contents.

function cs_clear($cache_file) {
    file_put_contents($cache_file, ''); // Clear the contents of the cache file
}