Cache a variable in the data store - Справочник: PHP5.4

Описание

bool apc_add ( string $key [, mixed $var [, int $ttl = 0 ]] )

array apc_add ( array $values [, mixed $unused [, int $ttl = 0 ]] )

Caches a variable in the data store, only if it's not already stored.

Замечание: Unlike many other mechanisms in PHP, variables stored using apc_add() will persist between requests (until the value is removed from the cache).

Список параметров

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.

Возвращаемые значения

Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки. Second syntax returns array with error keys.

Примеры

Пример #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";
?>

Результат выполнения данного примера:

string(3) "BAR"
string(3) "BAR"

Смотрите также

apc_store() - Cache a variable in the data store
apc_fetch() - Fetch a stored variable from the cache
apc_delete() - Removes a stored variable from the cache