<?php
class KCache {
	private $data = array();
	public  $expiry;
	function __construct($exp = 30) {
		$this->expiry = intval($exp);
	}
	public function __get($name) {
		if(apcu_exists($name)) {	return apcu_fetch($name); } 
		else { 
			if (array_key_exists($name, $this->data)) { return $this->data[$name]; } 
		}
	}
	public function __set($name, $value) {
		$this->data[$name] = $value;
		if(apcu_exists($name)) { /* */ } else { 
			apcu_store($name,$value,$this->expiry); 
		}
	}
	public function __isset($name) {
		if(apcu_exists($name)) { return TRUE; } else { return FALSE; }
	}
	public function __unset($name) {
			if(apcu_exists($name)) { apcu_delete($name); }
			unset($this->data[$name]);
	}
}
?>

This class will allow you to juggle the APCu functions by just referencing and setting them like normal varables. If you're using PHP 5.x you might need to roll the functions in here back to reflect the prefix 'apc_' instead of 'apcu_' for it to work properly.

<?php
function someFunction() {
	return 31337;
}
$cache = new KCache();
if(isset($cache->test)) {
	$test = "From Cache: ". $cache->test;
} else {
	$cache->test = someFunction();
	$test = "Fetching: ". $cache->test;
}
echo $test;
?>

This is a good function to store some small data you need but maybe requires more crunch than you'd like to see crunching every site load. Reload the example to see how it works after including the above class. You should see first that it fetched the information from the function then after reloading the page you have a cached value from that function.