(PECL apcu >= 4.0.0)
apcu_add — Cache a new variable in the data store
$ttl= 0): bool
$unused= NULL, int
$ttl= 0): array
Caches a variable in the data store, only if it's not already stored.
Note: Unlike many other mechanisms in PHP, variables stored using apcu_add() will persist between requests (until the value is removed from the cache).
Store the variable using this name.
cache-unique, so attempting to use apcu_add() to
store data with a key that already exists will not overwrite the
existing data, and will instead return
false. (This is the only
difference between apcu_add() and
The variable to store
Time To Live; store
var in the cache for
ttl seconds. After the
ttl has passed, the stored variable will be
expunged from the cache (on the next request). If no
is supplied (or if the
0), the value will persist until it is removed from
the cache manually, or otherwise fails to exist in the cache (clear,
Names in key, variables in value.
Returns TRUE if something has effectively been added into the cache, FALSE otherwise. Second syntax returns array with error keys.
Example #1 A apcu_add() example
$bar = 'BAR';
$bar = 'NEVER GETS SET';
The above example will output:
string(3) "BAR" string(3) "BAR"