apcu_exists
(PECL apcu >= 4.0.0)
apcu_exists — Checks if entry exists
Parametri
-
keys -
A string, or an array of strings, that contain keys.
Valorile întoarse
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.
Exemple
Example #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);
?>
Exemplul de mai sus va afișa ceva similar cu:
Foo exists: apple
Baz does not exist
array(2) {
["foo"]=>
bool(true)
["bar"]=>
bool(true)
}
A se vedea și
- apcu_cache_info() - Retrieves cached information from APCu's data store
- apcu_fetch() - Fetch a stored variable from the cache
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