apcu_exists
(PECL apcu >= 4.0.0)
apcu_exists — Checks if entry exists
Liste de paramètres
-
keys -
A string, or an array of strings, that contain keys.
Valeurs de retour
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.
Exemples
Exemple #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);
?>
Résultat de l'exemple ci-dessus est similaire à :
Foo exists: apple
Baz does not exist
array(2) {
["foo"]=>
bool(true)
["bar"]=>
bool(true)
}
Voir aussi
- apcu_cache_info() - Retrieves cached information from APCu's data store
- apcu_fetch() - Fetch a stored variable from the cache
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