apcu_exists
(PECL apcu >= 4.0.0)
apcu_exists — Checks if entry exists
Zwracane wartości
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.
Przykłady
Przykład #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);
?>
Powyższy przykład wyświetli coś podobnego do:
Foo exists: apple
Baz does not exist
array(2) {
["foo"]=>
bool(true)
["bar"]=>
bool(true)
}
Zobacz też:
- apcu_cache_info() - Retrieves cached information from APCu's data store
- apcu_fetch() - Fetch a stored variable from the cache
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