note 110121 added to function.apc-store

When specifying a ttl (Time-To-Live), you are allowed to use negative values. This causes a stored entry to be invalidated immediately, but note that it will not physically be removed until you read (eg. apc_fetch or apc_exists) it: <?php apc_store('testKey', 'testValue', -1); // ... or any negative integer. // at this point, the key exists physically but is already technically invalidated by the ttl. $test = apc_fetch('testKey'); // $test equals false. // at this point, the key no longer exists physically. ?> Although you could mimic apc_delete with a negative TTL (like when dealing with cookies), note that the difference is that apc_delete actually physically removes the entry. This example comes in handy when you want to unit-test a class that uses APC. It's faster to use a negative TTL than a positive in combination with a sleep call to test whether the cache entry has actually been deleted. Other than that I can't think of any situations in which you could use this example, but I'm simply pointing out that doing this will not generate Exceptions or errors. ---- Server IP: 83.137.20.135 Probable Submitter: 87.195.224.218 ---- Manual Page -- http://www.php.net/manual/en/function.apc-store.php Edit -- https://master.php.net/note/edit/110121 Del: integrated -- https://master.php.net/note/delete/110121/integrated Del: useless -- https://master.php.net/note/delete/110121/useless Del: bad code -- https://master.php.net/note/delete/110121/bad+code Del: spam -- https://master.php.net/note/delete/110121/spam Del: non-english -- https://master.php.net/note/delete/110121/non-english Del: in docs -- https://master.php.net/note/delete/110121/in+docs Del: other reasons-- https://master.php.net/note/delete/110121 Reject -- https://master.php.net/note/reject/110121 Search -- https://master.php.net/manage/user-notes.php