apc_exists
(PECL apc >= 3.1.4)
apc_exists — Checks if APC key exists
Возвращаемые значения
Returns TRUE
if the key exists, otherwise FALSE
Or if an
array was passed to keys
, then
an array is returned that contains all existing keys, or an empty
array if none exist.
Примеры
Пример #1 apc_exists() example
<?php
$fruit = 'apple';
$veggie = 'carrot';
apc_store('foo', $fruit);
apc_store('bar', $veggie);
if (apc_exists('foo')) {
echo "Foo exists: ";
echo apc_fetch('foo');
} else {
echo "Foo does not exist";
}
echo PHP_EOL;
if (apc_exists('baz')) {
echo "Baz exists.";
} else {
echo "Baz does not exist";
}
echo PHP_EOL;
$ret = apc_exists(array('foo', 'donotexist', 'bar'));
var_dump($ret);
?>
Результатом выполнения данного примера будет что-то подобное:
Foo exists: apple Baz does not exist array(2) { ["foo"]=> bool(true) ["bar"]=> bool(true) }
Смотрите также
- apc_cache_info() - Retrieves cached information from APC's data store
- apc_fetch() - Fetch a stored variable from the cache
Коментарии
apc_exists declaration if your PECL apc version is less than 3.1.4:
<?php
if(!function_exists('apc_exists'))
{
function apc_exists($keys)
{
$result;
apc_fetch($keys, $result);
return $result;
}
}
?>