function exampleFunction($arg) { static $cache = array(); if(array_key_exists($arg, $cache)) { return $cache[$arg]; } $result = // some computation based on $arg $cache[$arg] = $result; return $result; }In this example, the function `exampleFunction` stores the values of `$arg` in a static cache. If the function is called again with the same value of `$arg`, it retrieves the result from the cache, rather than computing it again. This saves on computation time and improves the overall performance of the application. The PHP static cache technique can be used in various PHP packages and libraries, such as Symfony Cache, Laravel Cache, and many others.