Retrieving an Item From the Cache

$value = Cache::get($key);
if ($value === null)
{
    echo "Value wasn't cached.";
}

If the value isn't found (or has expired), then Cache::get() returns the default, which is a second argument defaulting to null.

$value = Cache::get($key, 'default-value');
echo $value;  // either retrieved value or 'default-value'

Since the default value to Cache::get() is null, unless you pass a different second argument there's not way to tell if the null return represents the cached value or the default.

In other words, the following code is true.

Cache::put('test1', null, 60);    // store null as test1
Cache::forget('test2');           // delete test2 if it exists
if (Cache::get('test1') == Cache::get('test2'))
{
    echo "This always prints";
}