(PECL apc >= 3.0.13)
apc_add — Cache a new variable in the data store
Caches a variable in the data store, only if it's not already stored.
Hinweis: Unlike many other mechanisms in PHP, variables stored using apc_add() will persist between requests (until the value is removed from the cache).
key
Store the variable using this name. keys are
cache-unique, so attempting to use apc_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 apc_add() and
apc_store().)
var
The variable to store
ttl
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 ttl
is supplied (or if the ttl is
0), the value will persist until it is removed from
the cache manually, or otherwise fails to exist in the cache (clear,
restart, etc.).
values
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.
Beispiel #1 A apc_add() example
<?php
$bar = 'BAR';
apc_add('foo', $bar);
var_dump(apc_fetch('foo'));
echo "\n";
$bar = 'NEVER GETS SET';
apc_add('foo', $bar);
var_dump(apc_fetch('foo'));
echo "\n";
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
string(3) "BAR" string(3) "BAR"