apcu_exists
(PECL apcu >= 4.0.0)
apcu_exists — Checks if entry exists
Значення, що повертаються
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.
Приклади
Приклад #1 apcu_exists() example
<?php
$fruit = 'apple';
$veggie = 'carrot';
apcu_store('foo', $fruit);
apcu_store('bar', $veggie);
if (apcu_exists('foo')) {
echo "Foo exists: ";
echo apcu_fetch('foo');
} else {
echo "Foo does not exist";
}
echo PHP_EOL;
if (apcu_exists('baz')) {
echo "Baz exists.";
} else {
echo "Baz does not exist";
}
echo PHP_EOL;
$ret = apcu_exists(array('foo', 'donotexist', 'bar'));
var_dump($ret);
?>
Наведений вище приклад виведе щось подібне до:
Foo exists: apple
Baz does not exist
array(2) {
["foo"]=>
bool(true)
["bar"]=>
bool(true)
}
Прогляньте Також
- apcu_cache_info() - Retrieves cached information from APCu's data store
- apcu_fetch() - Fetch a stored variable from the cache
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